Large magnetocapacitance of up to 456% at room temperature in FeCo/MgAl₂O₄/FeCo(001) magnetic tunnel junctions

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2023-11-09 DOI:10.35848/1882-0786/ad0b40

Yuto Shibata, Kenta Sato, Hiroaki SUKEGAWA, Hideo Kaiju

引用次数: 0

Abstract

Abstract Tunnel magnetocapacitance (TMC) ratios greater than 450% are observed at room temperature in epitaxial FeCo/MgAl 2 O 4 /FeCo(001) magnetic tunnel junctions (MTJs). A high TMC is observed at a low bias of 75 mV, which is suitable for low-power electronics. The fitting results between experimental data and calculation based on extended Debye–Fröhlich model reveal that the high TMC ratio is obtained owing to the high spin polarization of FeCo and the spin capacitance of the lattice-matched interface between FeCo and MgAl 2 O 4 . Based on this model, a TMC ratio could reach 1500% in MTJs with a spin polarization of 90%.

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FeCo/MgAl2O4/FeCo(001)磁性隧道结室温下的大磁电容高达456%

室温下，外延FeCo/ mgal2o3 /FeCo(001)磁性隧道结(MTJs)的隧道磁电容(TMC)比大于450%。在75 mV的低偏置下观察到高TMC，适用于低功耗电子器件。实验数据与基于Debye-Fröhlich扩展模型的计算拟合结果表明，高TMC比是由于FeCo的高自旋极化和FeCo与mgal2o4晶格匹配界面的自旋电容。基于该模型，在自旋极化率为90%的MTJs中，TMC比可以达到1500%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).

Large magnetocapacitance of up to 456% at room temperature in FeCo/MgAl2O4/FeCo(001) magnetic tunnel junctions

Abstract

Large magnetocapacitance of up to 456% at room temperature in FeCo/MgAl₂O₄/FeCo(001) magnetic tunnel junctions