Synchrotron X-ray spectroscopic study of the antiferromagnetic-ferromagnetic transition in Ni-doped FeRh epitaxial thin films

Yujun Zhang; Jiahui Chen; Keisuke Ikeda; Kohei Yamagami; Yue Wang; Yongseong Choi; Akira Yasui; Jing Ma; Yuanhua Lin; Cewen Nan; Hiroki Wadati

doi:10.1016/j.jallcom.2022.166080

Synchrotron X-ray spectroscopic study of the antiferromagnetic-ferromagnetic transition in Ni-doped FeRh epitaxial thin films

Yujun Zhang^*, Jiahui Chen, Keisuke Ikeda, Kohei Yamagami, Yue Wang, Yongseong Choi, Akira Yasui, Jing Ma, Yuanhua Lin, Cewen Nan, Hiroki Wadati

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We investigate the change of magnetism and electronic structure across the antiferromagnetic (AFM) -ferromagnetic (FM) transition of Ni-doped FeRh epitaxial thin films by x-ray magnetic circular dichroism (XMCD) and hard x-ray photoemission spectroscopy (HAXPES). The Rh L edge XMCD results indicate that the remnant FM phase at low temperature possesses smaller Rh moment than the normal FM phase which can undergo AFM-FM transition. The HAXPES results confirm an increase of Rh 4d density of state at the Fermi level and a possible “well-screened” state at the Ni 2p photoemission in the FM phase. FM fluctuation of the inter-site Fe-Fe exchange coupling within the AFM phase can be interpreted from the temperature dependence of the Fe 2p HAXPES results.

Original language	English
Article number	166080
Journal	Journal of Alloys and Compounds
Volume	921
DOIs	https://doi.org/10.1016/j.jallcom.2022.166080
Publication status	Published - 15 Nov 2022
Externally published	Yes

Keywords

Antiferromagnetic-ferromagnetic transition
FeRh
Hard x-ray photoemission spectroscopy
X-ray magnetic circular dichroism

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10.1016/j.jallcom.2022.166080

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@article{3ce232037133482aa12e9121fb9aa639,

title = "Synchrotron X-ray spectroscopic study of the antiferromagnetic-ferromagnetic transition in Ni-doped FeRh epitaxial thin films",

abstract = "We investigate the change of magnetism and electronic structure across the antiferromagnetic (AFM) -ferromagnetic (FM) transition of Ni-doped FeRh epitaxial thin films by x-ray magnetic circular dichroism (XMCD) and hard x-ray photoemission spectroscopy (HAXPES). The Rh L edge XMCD results indicate that the remnant FM phase at low temperature possesses smaller Rh moment than the normal FM phase which can undergo AFM-FM transition. The HAXPES results confirm an increase of Rh 4d density of state at the Fermi level and a possible “well-screened” state at the Ni 2p photoemission in the FM phase. FM fluctuation of the inter-site Fe-Fe exchange coupling within the AFM phase can be interpreted from the temperature dependence of the Fe 2p HAXPES results.",

keywords = "Antiferromagnetic-ferromagnetic transition, FeRh, Hard x-ray photoemission spectroscopy, X-ray magnetic circular dichroism",

author = "Yujun Zhang and Jiahui Chen and Keisuke Ikeda and Kohei Yamagami and Yue Wang and Yongseong Choi and Akira Yasui and Jing Ma and Yuanhua Lin and Cewen Nan and Hiroki Wadati",

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year = "2022",

month = nov,

day = "15",

doi = "10.1016/j.jallcom.2022.166080",

language = "English",

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TY - JOUR

T1 - Synchrotron X-ray spectroscopic study of the antiferromagnetic-ferromagnetic transition in Ni-doped FeRh epitaxial thin films

AU - Zhang, Yujun

AU - Chen, Jiahui

AU - Ikeda, Keisuke

AU - Yamagami, Kohei

AU - Wang, Yue

AU - Choi, Yongseong

AU - Yasui, Akira

AU - Ma, Jing

AU - Lin, Yuanhua

AU - Nan, Cewen

AU - Wadati, Hiroki

PY - 2022/11/15

Y1 - 2022/11/15

N2 - We investigate the change of magnetism and electronic structure across the antiferromagnetic (AFM) -ferromagnetic (FM) transition of Ni-doped FeRh epitaxial thin films by x-ray magnetic circular dichroism (XMCD) and hard x-ray photoemission spectroscopy (HAXPES). The Rh L edge XMCD results indicate that the remnant FM phase at low temperature possesses smaller Rh moment than the normal FM phase which can undergo AFM-FM transition. The HAXPES results confirm an increase of Rh 4d density of state at the Fermi level and a possible “well-screened” state at the Ni 2p photoemission in the FM phase. FM fluctuation of the inter-site Fe-Fe exchange coupling within the AFM phase can be interpreted from the temperature dependence of the Fe 2p HAXPES results.

AB - We investigate the change of magnetism and electronic structure across the antiferromagnetic (AFM) -ferromagnetic (FM) transition of Ni-doped FeRh epitaxial thin films by x-ray magnetic circular dichroism (XMCD) and hard x-ray photoemission spectroscopy (HAXPES). The Rh L edge XMCD results indicate that the remnant FM phase at low temperature possesses smaller Rh moment than the normal FM phase which can undergo AFM-FM transition. The HAXPES results confirm an increase of Rh 4d density of state at the Fermi level and a possible “well-screened” state at the Ni 2p photoemission in the FM phase. FM fluctuation of the inter-site Fe-Fe exchange coupling within the AFM phase can be interpreted from the temperature dependence of the Fe 2p HAXPES results.

KW - Antiferromagnetic-ferromagnetic transition

KW - FeRh

KW - Hard x-ray photoemission spectroscopy

KW - X-ray magnetic circular dichroism

UR - http://www.scopus.com/inward/record.url?scp=85133564551&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2022.166080

DO - 10.1016/j.jallcom.2022.166080

M3 - Article

AN - SCOPUS:85133564551

SN - 0925-8388

VL - 921

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 166080

ER -

Synchrotron X-ray spectroscopic study of the antiferromagnetic-ferromagnetic transition in Ni-doped FeRh epitaxial thin films

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Keywords

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