Noncollinear magnetic order in epitaxial thin films of the centrosymmetric MnPtGa hard magnet

被引：4

作者：

Ibarra, R. ^{[1
,2
]}

Lesne, E. ^{[1
]}

Ouladdiaf, B. ^{[3
]}

Beauvois, K. ^{[3
]}

Sukhanov, A. S. ^{[2
]}

Schnelle, W. ^{[1
]}

Devishvili, A. ^{[4
,5
]}

Inosov, D. S. ^{[2
]}

Felser, C. ^{[1
]}

Markou, A. ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Tech Univ Dresden, Inst Festkorper & Materialphys, D-01069 Dresden, Germany

[3] Inst Laue Langevin, 6 Rue Jules Horowitz,BP 156, F-38042 Grenoble 9, France

[4] Inst Laue Langevin, 71 Ave Martyrs, F-38000 Grenoble, France

[5] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

来源：

APPLIED PHYSICS LETTERS | 2022年 / 120卷 / 17期

基金：

欧盟地平线“2020”;

关键词：

NEUTRON-DIFFRACTION; ANTISKYRMIONS; TEMPERATURE; CRYSTAL; HEUSLER;

D O I：

10.1063/5.0090009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic systems exhibiting spin-canted states have garnered much attention recently for their promising rich exotic properties driven by the real-space spin textures and competing magnetic orders. In this study, we present the structural and magnetic properties of hexagonal 60 nm MnPtGa epitaxial thin films grown by magnetron sputtering on Al2O3(0001) single-crystalline substrates. The MnPtGa film crystallizes in the centrosymmetric P6(3)/mmc (No. 194) space group, showing perpendicular magnetic anisotropy along the c-axis, with a Curie temperature T-C = 263 K. In addition, the MnPtGa film undergoes a spin reorientation transition at T-sr = 160 K. We investigated the MnPtGa magnetic ground states using single-crystal neutron diffraction. A structurally forbidden (001) magnetic Bragg reflection emerges below T-sr, indicating the existence of a spin-canted state, where the magnetic moments align ferromagnetically perpendicular to the basal plane, and a non-zero in-plane component exhibits an antiferromagnetic ordering along the c-axis. At 2 K, the refined magnetic moments of Mn are mu(z) = 4.2(4) mu(B) and mu(x) = 1.5(3) mu(B), projected onto the c-axis and basal plane, respectively. Hence, we determined a 20 degrees Mn spin canting angle off from the c-axis. (C) 2022 Author(s).

引用

页数：5