2019/11/30 by M. Wang, C. Andrews, S. Reimers +29
Materials Science · Physics and Astronomy · #Anisotropy #Antiferromagnetism #Condensed matter physics #Magnetic and transport properties of perovskites and related materials #Magnetic anisotropy #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetocrystalline anisotropy #Magnetometer #Magnetoresistance #Materials science #Multiferroics and related materials #Néel temperature #Optics #Phase (matter) #Physics #Spin (aerodynamics) #Tetragonal crystal system #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.101.094429
published as Phys. Rev. B 101, 094429 (2020) · 26 pages, 6 figures
openalex publication_date 2020/03/23 · arxiv created 2021/06/21 · arxiv updated 2021/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report magnetic-field-induced rotation of the antiferromagnetic N'eel vector in epitaxial CuMnAs thin films. First, using soft x-ray magnetic linear dichroism spectroscopy as well as magnetometry, we demonstrate spin-flop switching and continuous spin reorientation in films with uniaxial and biaxial magnetic anisotropies, respectively, for applied magnetic fields of the order of 2 T. The remnant antiferromagnetic domain configurations are determined using x-ray photoemission electron microscopy. Next, we show that the N'eel vector reorientations are manifested in the longitudinal and transverse anisotropic magnetoresistance. Dependencies of the electrical resistance on the orientation of the N'eel vector with respect to both the electrical current direction and the crystal symmetry are identified, including a weak fourth-order term evident at high magnetic fields. The results provide characterization of key parameters including the anisotropic magnetoresistance coefficients, magnetocrystalline anisotropy, and spin-flop field in epitaxial films of tetragonal CuMnAs, a candidate material for antiferromagnetic spintronics.