Oxygen vacancies of YIG influence on the MPE in Au/YIG heterostructures

DOI

10.2991/icmmita-16.2016.74How to use a DOI?

Keywords

Oxygen vacancies; Magnetic proximity effect; Au/YIG heterostructures.

Abstract

The oxygen vacancies of Y3Fe5O12(YIG) influence on the magnetic proximity effect (MPE) in Au/YIG heterostructures has been studied by first principles calculations based on the density functional theory (DFT). The results show that one oxygen vacancies can reduce the two neighbor Fe3+ to Fe2+ and MPE in Au/YIG is strongly depended on the valence states of Fe ion. The induced magnetism in Au atoms is found to increase with the increasing concentration of Fe2+. In oxygen vacancy free case (Fe3+ state), weak electron states hybridization of Fe(3d) and Au(5d) is found form the projected electron density of states distribution, while after introduce the oxygen vacancy (Fe2+ state), the states of Fe(3d) are generally move to higher energy states and hybridize with the Au(5d) states. Moreover, more states of Fe2+ at tetrahedral sites are hybridize with the Au(5d) states compare with that of Fe2+ at octahedral sites, therefore a net magnetic moment induced Au atoms is found and the direction of spin polarization of Au atoms is paralleled to Fe ion at tetrahedral sites.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiao Liang
AU  - Fei Huang
AU  - Chuangtang Wang
AU  - Yupeng Zhu
AU  - Yan Zhang
AU  - Yue Li
AU  - Lei Bi
PY  - 2017/01
DA  - 2017/01
TI  - Oxygen vacancies of YIG influence on the MPE in Au/YIG heterostructures
BT  - Proceedings of the 2016 4th International Conference on Machinery, Materials and Information Technology Applications
PB  - Atlantis Press
SP  - 410
EP  - 414
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmmita-16.2016.74
DO  - 10.2991/icmmita-16.2016.74
ID  - Liang2017/01
ER  -