| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Tunable Perpendicular Magnetic Anisotropy in Off-Stoichiometric Full-Heusler Alloy Co$_{2}$MnAl |
| Zhi-Feng Yu1,2, Jun Lu1,2, Hai-Long Wang1,2, Xu-Peng Zhao1,2, Da-Hai Wei1,2, Jia-Lin Ma1,2, Si-Wei Mao1,2, Jian-Hua Zhao1,2,3** |
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100190
3Beijing Academy of Quantum Information Sciences, Beijing 100193
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| Cite this article: |
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Zhi-Feng Yu, Jun Lu, Hai-Long Wang et al 2019 Chin. Phys. Lett. 36 067502 |
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Abstract Off-stoichiometric full-Heusler alloy Co$_{2}$MnAl thin films with different thicknesses are epitaxially grown on GaAs (001) substrates by molecular-beam epitaxy. The composition of the films, close to Co$_{1.65}$Mn$_{1.35}$Al (CMA), is determined by x-ray photoelectron spectroscopy and energy dispersive spectroscopy. Tunable perpendicular magnetic anisotropy (PMA) from 3.41 Merg/cm$^{3}$ to 1.88 Merg/cm$^{3}$ with the thickness increasing from 10 nm to 30 nm is found, attributed to the relaxation of residual compressive strain. Moreover, comparing with the ultrathin CoFeB/MgO used in the conventional perpendicular magnetic tunnel junction, the CMA electrode has a higher magnetic thermal stability with more volume involved. The PMA in CMA films is sustainable up to 300$^{\circ}\!$C, compatible with semiconductor techniques. This work provides a possibility for the development of perpendicular magnetized full-Heusler compounds with high thermal stability and spin polarization.
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Received: 04 March 2019
Published: 18 May 2019
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| PACS: |
75.50.Cc
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(Other ferromagnetic metals and alloys)
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75.30.Gw
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(Magnetic anisotropy)
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81.15.Hi
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(Molecular, atomic, ion, and chemical beam epitaxy)
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| Fund: Supported by the National Key Research and Development Program of China under Grant Nos 2017YFB0405701 and 2018YFB0407601, the National Natural Science Foundation of China under Grant Nos U1632264 and 11874349, and the Key Research Project of Frontier Science of the Chinese Academy of Sciences under Grant Nos QYZDY-SSW-JSC015 and XDPB12. |
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| [1] | de Groot R A, Mueller F M, van Engen P G and Buschow K H J 1983 Phys. Rev. Lett. 50 2024 | | [2] | Trudel S, Gaier O, Hamrle J and Hillebrands B 2010 J. Phys. D 43 193001 | | [3] | Picozzi S, Continenza A and Freeman A J 2002 Phys. Rev. B 66 094421 | | [4] | Graf T, Felser C and Parkin S S P 2011 Prog. Solid State Chem. 39 1 | | [5] | Kent A D 2010 Nat. Mater. 9 699 | | [6] | Liu H F, Ali S S and Han X F 2014 Chin. Phys. B 23 077501 | | [7] | Zeng Z, Amiri P K, Krivorotov I N, Zhao H, Finocchio G, Wang J P, Jordan A K, Huai Y M, Langer J, Galatsis K, Wang K L and Jiang H W 2012 ACS Nano 6 6115 | | [8] | Hirohata A, Frost W, Samiepour M and Kim J Y 2018 Materials 11 105 | | [9] | Mao S W, Lu J, Zhao X P, Wang X L, Wei D H, Liu J, Xia J B and Zhao J H 2017 Sci. Rep. 7 43064 | | [10] | Hiratsuka T, Kim G, Sakuraba Y, Kubota T, Kodama K, Inami N, Naganuma H, Oogane M, Nakamura T, Takanashi K and Ando Y 2010 J. Appl. Phys. 107 09C714 | | [11] | Wen Z, Sukegawa H, Kasai S, Hayashi M, Mitani S and Inomata K 2012 Appl. Phys. Express 5 063003 | | [12] | Jamer M E, Assaf B A, Devakul T and Heiman D 2013 Appl. Phys. Lett. 103 142403 | | [13] | Feng Y, Zhou T, Chen X, Yuan H and Chen H 2015 J. Magn. Magn. Mater. 387 118 | | [14] | Meng K K, Miao J, Xu X G, Zhao J H and Jiang Y 2017 Phys. Lett. A 381 1202 | | [15] | Xiao J X, Lu J, Zhu L J and Zhao J H 2016 Acta Phys. Sin. 65 118105 (in Chinese) | | [16] | Zhu L J, Nie S H, Meng K K, Pan D, Zhao J H and Zheng H 2012 Adv. Mater. 24 4547 | | [17] | Yakushiji K, Saruya T, Kubota H, Fukushima A, Nagahama T, Yuasa S and Ando K 2010 Appl. Phys. Lett. 97 232508 | | [18] | Yoshikawa M, Kitagawa E, Nagase T, Daibou T, Nagamine M, Nishiyama K, Kishi T and Yoda H 2008 IEEE Trans. Magn. 44 2573 | | [19] | Winkelmann A, Przybylski M, Luo F, Shi Y and Barthel J 2006 Phys. Rev. Lett. 96 257205 | | [20] | Ouardi S, Kubota T, Fecher G H, Stinshoff R, Mizukami S, Miyazaki T, Ikenaga E and Felser C 2012 Appl. Phys. Lett. 101 242406 | | [21] | Ikeda S, Miura K, Yamamoto H, Mizunuma K, Gan H D, Endo M, Kanai S, Hayakawa J, Matsukura F and Ohno H 2010 Nat. Mater. 9 721 | | [22] | Wu D, Liu G L, Jing C, Wu Y Z, Loison D, Dong G S, Jin X F and Wang D S 2001 Phys. Rev. B 63 214403 | | [23] | Hilton J L, Schultz B D, McKernan S and Palmstr?m C J 2004 Appl. Phys. Lett. 84 3145 |
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