Magnetic properties and materials articles within Nature Communications

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  • Article
    | Open Access

    The thermal Hall effect has been reported in several materials, but it is not expected in triangular lattice systems due to chirality cancellation. Kim et al. report the thermal Hall effect attributed to topological spin fluctuations in the supposedly paramagnetic phase of YMnO3 with a trimerized triangular lattice.

    • Ha-Leem Kim
    • , Takuma Saito
    •  & Je-Geun Park

  • Article
    | Open Access

    The superconductor UTe2 exhibits a reentrant superconducting phase at magnetic fields above 40 T for particular field angles. Here, from high-field Hall-effect measurements, T. Helm et al. find evidence for a partial compensation between the applied field and an exchange field, pointing to the Jaccarino-Peter effect as a possible mechanism for the reentrant superconductivity.

    • Toni Helm
    • , Motoi Kimata
    •  & Jean-Pascal Brison

  • Article
    | Open Access

    At the microscopic level, the localized spins arise due to the electron-electron interactions. Here, the authors show how a topological phase of the Haldane spin chain emerges in a two-orbital Hubbard model with increasing interaction strength.

    • A. Jażdżewska
    • , M. Mierzejewski
    •  & J. Herbrych

  • Article
    | Open Access

    Van der Waals antiferromagnets offer a unique platform for studying magnetism in reduced dimensions, however, the low dimensionality, combined with lack of net magnetization, renders investigation challenging with conventional experimental probes. Here, Houmes et al show how van der Waals antiferromagnets can be investigated via the resonances of a vibrating rectangular membranes of this material.

    • Maurits J. A. Houmes
    • , Gabriele Baglioni
    •  & Herre S. J. van der Zant

  • Article
    | Open Access

    “Exchange bias” occurs in heterostructures of antiferromagnets and ferromagnetic materials, which biases the magnetization of the ferromagnet so that it exhibits a preferred direction. This phenomenon has proven critical for the development of a variety of spintronic devices. Here, Hasan et al demonstrate reversible control of exchange bias via solid-state hydrogen gating.

    • M. Usama Hasan
    • , Alexander E. Kossak
    •  & Geoffrey S. D. Beach

  • Article
    | Open Access

    Shortening the inter-spin distance is an effective way to enhance magnetic coupling. However, it is typically challenging to change the inter-ion distance in most magnetic systems. Here, Huang et al present a strategy for enhancing magnetic interactions, by confining a molecular magnetic system inside a carbon fullerene cage, leading to enhanced magnetic properties.

    • Chenli Huang
    • , Rong Sun
    •  & Song Gao

  • Article
    | Open Access

    Skyrmion crystals, where skyrmions are arranged close packed in a triangular lattice arise due to the superposition of three magnetic spin spirals, each with a distinct wave vector, Q. Such skrymion crystals have been found in a diverse array of materials. Here, Park et al find a short wavelength (or dense skyrmion) limit of this skyrmion crystal structure in Co1/3TaS2, a metallic triangular lattice antiferromagnet, in the form of a triple Q magnetic ordering, with four magnetic sublattices.’

    • Pyeongjae Park
    • , Woonghee Cho
    •  & Je-Geun Park

  • Article
    | Open Access

    Hyperbolic exciton polaritons (HEPs) are anisotropic light-matter excitations with promising applications, but their steady-state observation is challenging. Here, the authors report experimental evidence of HEPs in a van der Waals magnet, CrSBr, via cryogenic infrared near-field microscopy.

    • Francesco L. Ruta
    • , Shuai Zhang
    •  & D. N. Basov

  • Article
    | Open Access

    Kondo materials exhibit extremely rich physics, from unconventional superconductivity to topological phases. Unfortunately, for a real material, direct solution of the Kondo lattice is practically impossible. Here, Simeth et al. present a tractable approach to this problem, showing how a multi-orbital periodic Anderson model can be reduced to a Kondo lattice model, and be applied to relevant materials and quantitatively validated with neutron spectroscopy.

    • W. Simeth
    • , Z. Wang
    •  & M. Janoschek

  • Article
    | Open Access

    The anomalous Hall effect is typically associated with ferromagnets and referred to as anomalous due to its persistence even after the applied magnetic field is removed, due to the net magnetization of the ferromagnet. Recently there has been much interest in antiferromagnets that can host an anomalous Hall effect, despite a vanishing magnetization, and here, Wang et al observe an anomalous Hall effect in collinearly antiferromagnetic chromium doped RuO2.

    • Meng Wang
    • , Katsuhiro Tanaka
    •  & Fumitaka Kagawa

  • Article
    | Open Access

    Soft magnetic materials are critical components of electric motors, generators and transformers, however obtaining a material that is magnetically soft, but mechanically robust and stable at high temperature is very difficult. Here, Han et al succeed in combining these disparate properties by introducing ferromagnetic Widmanstätten patterned intermetallic precipitates into a ferromagnetic alloy matrix.

    • Liuliu Han
    • , Fernando Maccari
    •  & Dierk Raabe

  • Article
    | Open Access

    The anomalous Hall effect in materials with complex magnetic structures has attracted significant research attention. Here the authors report anisotropic anomalous Hall effect in epitaxial NiCo2O4 films attributed to an extended toroidal quadrupole conical magnetic order.

    • Hiroki Koizumi
    • , Yuichi Yamasaki
    •  & Hideto Yanagihara

  • Article
    | Open Access

    Magnetoelectric coupling, where magnetic and electronic order is linked, allows for the control of magnetism via an electric field and vice versa, potentially offering new approaches to data storage, sensors, actuators and wealth of other devices. Here, using a diverse array of experimental probes, Xu et al show the emergence of both diagonal and off-diagonal magnetoelectric coupling in CoTe6O13.

    • Xianghan Xu
    • , Yiqing Hao
    •  & R. J. Cava

  • Article
    | Open Access

    Recently, time-reversal symmetry-breaking charge order was demonstrated in the AV3Sb5 (A = K, Rb, Cs) family of kagome superconductors. Here the authors extend this observation to the recently discovered kagome material ScV6Sn6 and discuss differences and similarities to other charge-ordered kagome lattices.

    • Z. Guguchia
    • , D. J. Gawryluk
    •  & H. Luetkens

  • Article
    | Open Access

    Experimental approaches that can directly measure spin-lattice coupling are rare. Here, authors report direct observation of the coupling of the phonon and magnon dynamics of a coherently driven electromagnon in a multiferroic hexaferrite using time-resolved X-ray diffraction. (277 characters in total).

    • Hiroki Ueda
    • , Roman Mankowsky
    •  & Urs Staub

  • Article
    | Open Access

    External fields can control the motion of colloidal particles inducing different trajectories depending on for instance the particle size. The authors here use nonperiodic energy landscapes and topological protection to transport a collection of identical colloidal particles simultaneously and independently.

    • Nico C. X. Stuhlmüller
    • , Farzaneh Farrokhzad
    •  & Daniel de las Heras

  • Article
    | Open Access

    The Kondo effect from magnetic impurities has been proposed as a probe of fractionalized excitations in a topological quantum spin liquid. Lee et al. experimentally demonstrate the Kondo effect in a Kitaev candidate material α-RuCl3 with dilute Cr impurities.

    • S. Lee
    • , Y. S. Choi
    •  & K.-Y. Choi

  • Article
    | Open Access

    A Weyl semimetal formally requires either broken time reversal symmetry or inversion symmetry. One class of Weyl semimetals-the crystal family of NdAlSi-exhibits both. Here, Li et al perform angle-resolved photoemission spectroscopy measurements on NdAlSi, and observe the formation of an additional Weyl fermion as the material becomes ferrimagnetic.

    • Cong Li
    • , Jianfeng Zhang
    •  & Oscar Tjernberg

  • Article
    | Open Access

    Recently the Kondo effect has been observed in transition metal dichalcogenide heterobilayers, but the evidence for low-temperature coherent state has been missing. Wan et al. observe signatures of such state in the form of a split Kondo peak with a characteristic magnetic-field dependence by STM at 340 mK.

    • Wen Wan
    • , Rishav Harsh
    •  & Miguel M. Ugeda

  • Article
    | Open Access

    When two magnetic layers are separated by a metallic spacer, an interlayer exchange coupling can occur. Recently, it has been shown that interlayer Dzyaloshinskii-Moriya interactions can also occur, driving chiral spin canting in the magnetic layers. Here, Arregi et al. demonstrate a large interlayer Dzyaloshinskii-Moriya interaction in Co/Ag/Co multilayers, which occurs despite the weak atomic spin-orbit coupling of the Ag spacer layer.

    • Jon Ander Arregi
    • , Patricia Riego
    •  & Elena Y. Vedmedenko

  • Article
    | Open Access

    Magnetic impurities on superconductors lead to bound states within the superconducting gap, so called Yu-Shiba-Rusinov (YSR) states. Here, the authors study tunneling from a vanadium STM tip to a V(100) surface and show that YSR states can be excited at very low temperature by applying a microwave signal.

    • Janis Siebrecht
    • , Haonan Huang
    •  & Christian R. Ast

  • Article
    | Open Access

    Zig-Zag graphene nanoribbons have edge states that are predicted to be spin-polarized, however, measurement of these spin-polarized states has proved elusive. Here, Brede et al overcome this challenge by growing graphene nanoribbons on ferromagnetic GdAu2, allowing for the direct observation of the spin-polarized edge states.

    • Jens Brede
    • , Nestor Merino-Díez
    •  & David Serrate

  • Article
    | Open Access

    Recently topological phases have been generalized to amorphous materials, but demonstrations have been limited to non-interacting particles. Cassella et al. show the emergence of chiral amorphous quantum spin liquid in an exactly soluble model by extending the Kitaev honeycomb model to random lattices.

    • G. Cassella
    • , P. d’Ornellas
    •  & J. Knolle

  • Article
    | Open Access

    Control of spins down to the atomic scale is a major goal for spin-based information processing. Here, Kot et al. demonstrate electric control over the spin-resonance transitions of a single TiH molecule placed on a surface of MgO by exploiting the electric field between the scanning tunnelling microscopy tip and the sample.

    • Piotr Kot
    • , Maneesha Ismail
    •  & Christian R. Ast

  • Article
    | Open Access

    Weyl semimetals exhibit a rich variety of transport phenomena, but it usually takes low temperatures and a strong magnetic field to realize them. Here, Quirk et al. show that when the ferromagnetic Weyl semimetal Co2MnGa is polished to micron thicknesses, it develops a remarkable resistance anisotropy that has opposite directions on opposing crystal faces. They show that this unusual transport property, which is robust at room temperature and in a strong magnetic field, may be generated by distinct conducting states on the surfaces of these thin crystals.

    • Nicholas P. Quirk
    • , Guangming Cheng
    •  & N. P. Ong

  • Article
    | Open Access

    Conventional voltage control of magnetism relies on making direct electrical contacts to target samples. Here, wireless converse magnetoelectric actuation through bipolar electrochemistry is reported in magnetoionic transition metal nitride films.

    • Zheng Ma
    • , Laura Fuentes-Rodriguez
    •  & Jordi Sort

  • Article
    | Open Access

    Homochirality, a key feature of life, has unknown origins. Magnetic mineral surfaces can act as chiral agents, but are only weakly magnetized by nature. Here, the authors report the uniform magnetization of magnetite by an RNA precursor that spreads across the surface like an avalanche.

    • S. Furkan Ozturk
    • , Deb Kumar Bhowmick
    •  & Dimitar D. Sasselov

  • Article
    | Open Access

    The interplay between magnetism and charge density wave in the kagome magnet FeGe is under debate. By using elastic and inelastic X-ray scattering, angle-resolved photoemission spectroscopy, and first principles calculations, Miao et al. propose that the charge density wave is stabilized by spin-phonon coupling.

    • H. Miao
    • , T. T. Zhang
    •  & H. N. Lee

  • Article
    | Open Access

    Ca3Ru2O7 is a layered ruthenate, which undergoes a spin-reorientation transition where the spins rotate 90 degrees between two anti-ferromagnetic states. Despite extensive study, the driver of this transition has proved elusive. Here, using neutron and resonant x-ray scattering, Dashwood et al. show that this transition is driven by lattice strain.

    • C. D. Dashwood
    • , A. H. Walker
    •  & D. F. McMorrow

  • Article
    | Open Access

    A magnetic crystal hosts both magnons, the quanta of spin waves, and phonons, the quanta of lattice vibrations. In some materials with strong coupling between spins and lattices, a magnon-polaron can form. Here, using neutron scattering on a multiferroic, Fe2Mo3O8, Bao et al. observe magnon-polaron, and show that it is topologically non-trivial.

    • Song Bao
    • , Zhao-Long Gu
    •  & Jinsheng Wen

  • Article
    | Open Access

    Néel spin-orbit torques can occur in antiferromagnets with broken inversion symmetry, such as Mn2Au, and have garnered significant interest recently, as they allow for the electrical control of the antiferromagnetic ordering. Here, Behovits et al. apply intense terahertz electric fields to Mn2Au and observe the deflection of the Néel vector on ultrafast time scales due to Néel spin-orbit torques.

    • Y. Behovits
    • , A. L. Chekhov
    •  & T. Kampfrath

  • Article
    | Open Access

    Exciton-polaritons are hybrid light matter quasi-particles, which can occur in systems exhibiting strong light-matter coupling. Here, Wang et al study exciton-polaritons in the van der Waals antiferromagnetic material, CrSBr, coupled to a Tamm plasmon microcavity and find the exciton-polaritons are sensitive to and can be tuned by the magnetic order of CrSBr.

    • Tingting Wang
    • , Dingyang Zhang
    •  & Wenjing Liu

  • Article
    | Open Access

    Symmetry is an essential ingredient that governs numerous physical phenomena, including spin transport. Following this principle, spin current sources with a highly symmetric cubic structure are not expected to support anisotropic spin currents. Here, the authors demonstrate an anomalous spin current anisotropy in a cubic noncollinear antiferromagnet Mn3Pt by exploiting the combination of conventional and magnetic spin-hall effects.

    • Cuimei Cao
    • , Shiwei Chen
    •  & Qingfeng Zhan

  • Article
    | Open Access

    Artificial spin ice systems have been used to simulate a variety of phenomena including phase transitions. Here, the authors expand the scope of applications to encompass non-ergodic dynamics, by reporting real-space imaging of ergodicity transitions in a vortex-frustrated artificial spin ice.

    • Michael Saccone
    • , Francesco Caravelli
    •  & Alan Farhan

  • Article
    | Open Access

    Skyrmions are topological spin textures, which have been proposed as useful for a diverse array of applications. One such proposal is to make use of a skyrmion’s thermally activated Brownian-like diffusive motion for unconventional computing and true random number generation. Here, Dohi et al show how, in a synthetic antiferromagnet, this diffusive motion can be significantly enhanced.

    • Takaaki Dohi
    • , Markus Weißenhofer
    •  & Mathias Kläui

  • Article
    | Open Access

    Switching the magnetization of a ferromagnetic layer with a current induced spin-orbit torques requires the breaking symmetry, either via an in-plane magnetic field, or in the case of field-free switching via a device asymmetry. Here, Liang et al carefully control the Burgers vector of crystal dislocations to break the in-plane symmetry and allow for field-free switching of magnetization in a Pt/Co heterostructure.

    • Yuhan Liang
    • , Di Yi
    •  & Yuan-Hua Lin

  • Article
    | Open Access

    Magnons (spin-waves) in magnetic materials offer the potential for fast and efficient information processing. To avoid excessive damping due to free electrons, one is typically limited to magnetic insulators as host materials. Here, Poelchen et al demonstrate long lived spin-waves, at terahertz frequencies in the metallic antiferromaget CeCo2P2, opening up the possibility of using metallic aniferromagnets for spinwave information processing.

    • G. Poelchen
    • , J. Hellwig
    •  & K. Kummer

  • Article
    | Open Access

    Kagome materials, such as CsV3Sb5, a rich array of correlated phase, including a time-reversal symmetry breaking phase, which could possibly be the result of loop currents. Attempts to verify this with magneto-optical measurements have yielded mixed results. Here, Farhang et al show that the magneto-optical signals are due to specular optical rotation. ‘

    • Camron Farhang
    • , Jingyuan Wang
    •  & Jing Xia

  • Article
    | Open Access

    A hidden effect can occur in materials where locally a symmetry is broken, even though global symmetry is preserved. An example is hidden spin-polarization, arising from local inversion symmetry breaking in otherwise globally centro-symmetric materials. Here, Yuan et al uncover a hidden spin-polarization that can occur in antiferromagnets without spin-orbit coupling and identify the key material requirements for this to occur.

    • Lin-Ding Yuan
    • , Xiuwen Zhang
    •  & Alex Zunger

  • Article
    | Open Access

    Dressing is a concept used to describe moderately interacting electrons. Here authors present the notion of dressed spin-orbit 3/2 moments and how this picture breaks down with increasing electronic interactions across group-5 lacunar spinel magnets.

    • Thorben Petersen
    • , Pritam Bhattacharyya
    •  & Liviu Hozoi

  • Article
    | Open Access

    Artificial spin ices are composed of a honeycomb lattice of nanoscale magnets. Depending on the orientation of the magnets in the lattice, the spin ice can host high or low effective magnetic charge at each vertex. Here, Guo et al use neutron spin echo spectroscopy to show that these magnetic charges exhibit sub-ns relaxation times, analogous to bulk spin-ices.

    • J. Guo
    • , P. Ghosh
    •  & D. K. Singh

  • Article
    | Open Access

    Magnetic random access memory (MRAM) exhibits remarkable device endurance, while also offering potential operation speed and energy efficiency improvements compared to conventional random access memory. However, challenges remain, both in terms of efficiency, and miniaturization. Here, Wang et al demonstrate a van der Waals (vdW) based spin-orbit torque switching, in a Fe3GeTe2/Bi2Te3 heterostructure, paving the way for thinner and higher efficiency spin-orbit torque based vdW MRAM.

    • Haiyu Wang
    • , Hao Wu
    •  & Weisheng Zhao

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