Tuning the ferromagnetism of epitaxial-strained D019-Mn3Ga thin films

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:471

Article

Holguin-Momaca, Jose T.¹  Munoz-Carnero, Christian J.¹  Sharma, Himanshu²  Santillan-Rodriguez, Carlos R.¹  Matutes-Aquino, Jose A.¹  Tomy, C., V³  Olive-Mendez, Sion F.¹ 

[1] Ctr Invest Mat Avanzados SC CIMAV, Miguel de Cervantes 120, Chihuahua 31136, Chih, Mexico

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

关键词: Non-collinear antiferromagnet;    Ferromagnetic;    D0(19)-Mn3Ga;    Epitaxial thin film;    Deformation;   

DOI  :  10.1016/j.jmmm.2018.09.100

来源: Elsevier

【 摘 要 】

The hexagonal D0(19)-Mn3Ga phase is a non-collinear antiferromagnet with a triangular spin configuration. The Mn magnetic moments, lying in the (0 0 1) basal plane, are slightly canted towards the c axis producing a ferromagnetic component (FMC), which saturation magnetization in bulk samples is 7.7 kAm(-1). Here, we report on the epitaxial growth of Mn3Ga epitaxial thin films on MgO(1 1 1), GaN(0 0 1) and MgO(0 0 1)/Pt(1 1 1) substrates with lattices mismatches of -4.77%, 2.1%, and 2.45%, respectively. Structural characterization with reflection high-energy electron diffraction was used to evaluate the critical thicknesses at which relaxation is reached. We provide evidence of the manipulation of the magnitude of the FMC of the Mn3Ga thin films grown under tensile and compressive deformations. The FMC has been tuned from 23.7 to 11.8 and 2.5 kAm(-1) for the growth of Mn3Ga on MgO(1 1 1), GaN(0 0 1), and MgO(0 0 1)/Pt(1 1 1) substrates. The modulation of the FMC is explained in terms of the Dzyaloshinskii-Moriya interaction.

【 授权许可】

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