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Heat-assisted microwave amplifier

In a magnetic tunnel junction, Joule heat increases the voltage-controlled magnetic anisotropy effect in the free layer and thereby pushes the amplification gain for microwaves beyond one.

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Fig. 1: Three types of existing microwave applications based on magnetic tunnel junctions (MTJs).


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Correspondence to Qiming Shao or Kang L. Wang.

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Shao, Q., Wang, K.L. Heat-assisted microwave amplifier. Nature Nanotech 14, 9–11 (2019).

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