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Spin Hall magnetoresistance and the effect of post-annealing temperature in the MOD-grown HoIG SCIE SCOPUS

Title
Spin Hall magnetoresistance and the effect of post-annealing temperature in the MOD-grown HoIG
Authors
Cao Van, PhuocKim, HyeongyuNguyen Thi, TrinhDuong Viet, DucCao, Viet AnhNah, JunhyoPark, Sang J.Jin, HyungyuJo, YounghunPark, Seung-YoungPark, JungjaeYuk, Jong MinKim, Kab-JinJeong, Jong-Ryul
Date Issued
2023-04
Publisher
Elsevier BV
Abstract
We present the fabrication of ultrathin Ho3Fe5O12 (HoIG) films on 111- oriented-Gd3Ga5O12 (GGG) via the metal-organic decomposition (MOD) method followed by a sequence annealing process. We characterized the crystal structure, surface morphology, and magnetic properties to study the effect of annealing temperature on the quality of MOD-grown HoIG films. For temperatures higher than 800 ⁰C, we observe the infiltration of Iron (Fe) from the HoIG film into the GGG substrate. In particular, the Fe-diffusion is significantly enhanced for a 1000 ⁰C-annealed sample of which crystal structure and magnetic properties are also affected. For temperatures lower than 800 ⁰C, on the other hand, the smooth surface and strong crystallinity cannot be guaranteed. This suggests that an annealing temperature of 800 ⁰C is the optimal condition for the MOD-grown HoIG film. The quality of the sample is further confirmed by measuring the spin Hall magnetoresistance (SMR) of HoIG/Pt, in which we found the unconventional angular dependence and comparable spin mixing conductance similar to the previous reports in other single crystalline IGs. © 2023 Elsevier B.V.
URI
https://oasis.postech.ac.kr/handle/2014.oak/116069
DOI
10.1016/j.jallcom.2023.169019
ISSN
0925-8388
Article Type
Article
Citation
Journal of Alloys and Compounds, vol. 941, page. 169019, 2023-04
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진현규JIN, HYUNGYU
Dept of Mechanical Enginrg
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