TY - JOUR
T1 - Magnetization process of the layered diluted ferromagnetic semiconductor (Ba,K)(Zn,Mn)2As2 studied by x-ray magnetic circular dichroism
AU - Wan, Yuxuan
AU - Zhao, Guoqiang
AU - Shibata, Goro
AU - Ikeda, Keisuke
AU - Suzuki, Masahiro
AU - Kobayashi, Masaki
AU - Sakamoto, Shoya
AU - Deng, Zheng
AU - Zhao, Kan
AU - Chen, Bijuan
AU - Takeda, Yukiharu
AU - Okane, Tetsuo
AU - Saitoh, Yuji
AU - Yamagami, Hiroshi
AU - Uemura, Yasutomo J.
AU - Jin, Changqing
AU - Fujimori, Atsushi
N1 - Publisher Copyright:
©2026 American Physical Society.
PY - 2026/5/1
Y1 - 2026/5/1
N2 - The layered 122-type diluted ferromagnetic semiconductor (Ba,K)(Zn,Mn)2As2 has attracted much attention both for its high Curie temperature up to ∼230 K and for the independent control of charge-carrier and spin concentrations through doping K and Mn atoms at the Ba and Zn sites, respectively. In order to unveil the nature of the ferromagnetism in (Ba,K)(Zn,Mn)2As2, its magnetization process has been studied by x-ray magnetic circular dichroism (XMCD) at the Mn L2,3 edge in a wide range of temperature and magnetic field. The average magnetization of the Mn atoms as a function of magnetic field (M–H curves) at various temperatures could be successfully explained by a mixture of paramagnetic (PM), superparamagnetic (SPM), and ferromagnetic (FM) components as previously reported for GaMnAs, revealing the complex nature of the ferromagnetism in (Ba,K)(Zn,Mn)2As2. The average magnetization of the SPM clusters of different sizes and the FM regions were found to be small compared to those in GaMnAs, which we attribute to the antiferromagnetic interaction between nearest-neighbor Mn atoms in (Ba,K)(Zn,Mn)2As2 on the basis of recent theoretical predictions.
AB - The layered 122-type diluted ferromagnetic semiconductor (Ba,K)(Zn,Mn)2As2 has attracted much attention both for its high Curie temperature up to ∼230 K and for the independent control of charge-carrier and spin concentrations through doping K and Mn atoms at the Ba and Zn sites, respectively. In order to unveil the nature of the ferromagnetism in (Ba,K)(Zn,Mn)2As2, its magnetization process has been studied by x-ray magnetic circular dichroism (XMCD) at the Mn L2,3 edge in a wide range of temperature and magnetic field. The average magnetization of the Mn atoms as a function of magnetic field (M–H curves) at various temperatures could be successfully explained by a mixture of paramagnetic (PM), superparamagnetic (SPM), and ferromagnetic (FM) components as previously reported for GaMnAs, revealing the complex nature of the ferromagnetism in (Ba,K)(Zn,Mn)2As2. The average magnetization of the SPM clusters of different sizes and the FM regions were found to be small compared to those in GaMnAs, which we attribute to the antiferromagnetic interaction between nearest-neighbor Mn atoms in (Ba,K)(Zn,Mn)2As2 on the basis of recent theoretical predictions.
UR - https://www.scopus.com/pages/publications/105038170580
U2 - 10.1103/69sm-fz7z
DO - 10.1103/69sm-fz7z
M3 - 文章
AN - SCOPUS:105038170580
SN - 2475-9953
VL - 10
JO - Physical Review Materials
JF - Physical Review Materials
IS - 5
M1 - 054402
ER -