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Electrically programmable magnetoresistance in [Formula: see text]-based magnetic tunnel junctions. 2021

Jhen-Yong Hong, and Chen-Feng Hung, and Kui-Hon Ou Yang, and Kuan-Chia Chiu, and Dah-Chin Ling, and Wen-Chung Chiang, and Minn-Tsong Lin
Department of Physics, Tamkang University, New Taipei City, 25137 Taiwan.

We report spin-dependent transport properties and I-V hysteresis characteristics in an [Formula: see text]-based magnetic tunnel junction (MTJ). The bipolar resistive switching and the magnetoresistances measured at high resistance state (HRS) and low resistance state (LRS) yield four distinctive resistive states in a single device. The temperature dependence of resistance at LRS suggests that the resistive switching is not triggered by the metal filaments within the [Formula: see text] layer. The role played by oxygen vacancies in [Formula: see text] is the key to determine the resistive state. Our study reveals the possibility of controlling the multiple resistive states in a single [Formula: see text]-based MTJ by the interplay of both electric and magnetic fields, thus providing potential applications for future multi-bit memory devices.

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