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Spin Hall magnetoresistance in Pt/Cr$$_2$$O$$_3$$/YIG structure

Pt/Cr$$_2$$O$$_3$$/YIG構造のスピンホール磁気抵抗

Qi, J.*; Hou, D.*; Chen, Y.*; 齊藤 英治; Jin, X.*

Qi, J.*; Hou, D.*; Chen, Y.*; Saito, Eiji; Jin, X.*

Temperature dependence of the spin Hall magnetoresistance (SMR) has been investigated herein Pt/Cr$$_2$$O$$_3$$/Y$$_3$$Fe$$_5$$O$$_{12}$$ structure. Well below the N$'{e}$el temperature of Cr$$_2$$O$$_3$$, the SMR is not observed at the noise level of 1.2 ppm. In vicinity of the N$'{e}$el temperature, only a positive SMR tracks the YIG magnetic switching process, supporting that the SMR of normal metal/antiferromagnetic insulator/ferromagnetic insulator trilayer is controlled by the N$'{e}$el vector of the antiferromagnetic insulator. A high field magnetoresistance is observed up to an external magnetic field of 20000 Oe which has a field angle dependence symmetry consistent with the SMR. We attribute this high field magnetoresistance to be induced by the Hanle magnetoresistance in Pt.

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パーセンタイル:13.56

分野:Materials Science, Multidisciplinary

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