TY - JOUR
T1 - Observation of Anomalous Hall Effect in Collinear Antiferromagnet IrMn
AU - Zhu, Daoqian
AU - Lu, Jiaqi
AU - Jiang, Yuhao
AU - Zheng, Zhenyi
AU - Wang, Di
AU - Zhou, Chenghang
AU - Zhou, Jing
AU - Chen, Shaohai
AU - Gu, Youdi
AU - Liu, Liang
AU - Yang, Ping
AU - Shi, Kewen
AU - Peng, Shouzhong
AU - Xing, Guozhong
AU - Zhao, Weisheng
AU - Chen, Jingsheng
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/3/19
Y1 - 2025/3/19
N2 - The anomalous Hall effect (AHE) is a transport phenomenon typically observed in ferromagnetic materials with broken time-reversal symmetry (Formula presented). Recently, the AHE has been observed in several archetype antiferromagnets (AFMs), including altermagnets, and AFMs with noncollinear, noncoplanar or canted Néel order, due to the breaking of joint symmetry of sublattice-transposing and time-reversal operation. However, the AHE is generally not allowed in collinear AFMs due to symmetry constraints. Here, we report the observation of the AHE in a collinear AFM L10-IrMn (001) film. Scanning transmission electron microscopy investigation shows the presence of (200)-oriented grains in the L10-IrMn (001)-oriented film due to the large lattice mismatch between the films and substrate. Consequently, the (Formula presented) joint symmetry, with (Formula presented) being the translation operation, may be locally broken in our samples, thus enabling the AHE, which is further supported by ab initio calculations. Our work provides a novel way to generate the AHE in AFMs by engineering the local symmetry.
AB - The anomalous Hall effect (AHE) is a transport phenomenon typically observed in ferromagnetic materials with broken time-reversal symmetry (Formula presented). Recently, the AHE has been observed in several archetype antiferromagnets (AFMs), including altermagnets, and AFMs with noncollinear, noncoplanar or canted Néel order, due to the breaking of joint symmetry of sublattice-transposing and time-reversal operation. However, the AHE is generally not allowed in collinear AFMs due to symmetry constraints. Here, we report the observation of the AHE in a collinear AFM L10-IrMn (001) film. Scanning transmission electron microscopy investigation shows the presence of (200)-oriented grains in the L10-IrMn (001)-oriented film due to the large lattice mismatch between the films and substrate. Consequently, the (Formula presented) joint symmetry, with (Formula presented) being the translation operation, may be locally broken in our samples, thus enabling the AHE, which is further supported by ab initio calculations. Our work provides a novel way to generate the AHE in AFMs by engineering the local symmetry.
KW - Anomalous Hall effect
KW - Collinear antiferromagnet
KW - L1-IrMn
KW - Local symmetry breaking
UR - https://www.scopus.com/pages/publications/105001062819
U2 - 10.1021/acs.nanolett.4c06271
DO - 10.1021/acs.nanolett.4c06271
M3 - 文章
C2 - 40052629
AN - SCOPUS:105001062819
SN - 1530-6984
VL - 25
SP - 4307
EP - 4313
JO - Nano Letters
JF - Nano Letters
IS - 11
ER -