Structural, magnetic, and electrical properties of collinear antiferromagnetic heteroepitaxy cubic Mn$_3$Ga thin films
| Autor: | Bang, Hyun-Woo, Yoo, Woosuk, Kim, Chungman, Lee, Sunghun, Gu, Jiyeong, Park, Yunchang, Lee, Kyujoon, Jung, Myung-Hwa |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Appl. Phys. Lett. 115, 012402 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.5088790 |
| Popis: | Although a cubic phase of Mn$_3$Ga with an antiferromagnetic order has been theoretically predicted, it has not been experimentally verified in a bulk or film form. Here, we report the structural, magnetic, and electrical properties of antiferromagnetic cubic Mn$_3$Ga (C-Mn$_3$Ga) thin films, in comparison with ferrimagnetic tetragonal Mn$_3$Ga (T-Mn3Ga). The structural analyses reveal that C-Mn$_3$Ga is hetero-epitaxially grown on MgO substrate with the Cu$_3$Au-type cubic structure, which transforms to T-Mn$_3$Ga as the RF sputtering power increases. The magnetic and magnetotransport data show the antiferromagnetic transition at T$_N$ = 400 K for C-Mn$_3$Ga and the ferrimagnetic transition at T$_C$ = 820 K for T-Mn$_3$Ga. Furthermore, we find that the antiferromagnetic C-Mn$_3$Ga exhibits a higher electrical resistivity than the ferrimagnetic T-Mn$_3$Ga, which can be understood by spin-dependent scattering mechanism. Comment: 15 pages, 4 figures |
| Databáze: | arXiv |
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