Ferromagnetism and magneto-transport properties of Mn{sub 0.92}Ca{sub 0.08}As thin film grown on Al{sub 2}O{sub 3}(0001) substrate

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4866392· OSTI ID:22273768

Dung, Dang Duc; Van Thiet, Duong ^[1]; Anh Tuan, Duong; Cho, Sunglae ^[1]; Feng, Wuwei ^[2]

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1. Department of Physics, University of Ulsan, Ulsan 680-749 (Korea, Republic of)
2. School of Materials Science and Engineering, China University of Geosciences, Beijing 100083 (China)

The epitaxial Mn{sub 0.92}Ca{sub 0.08}As thin film was grown on Al{sub 2}O{sub 3}(0001) substrate by molecular beam epitaxy. The Curie temperature (T{sub C}) around 340 K was enhanced with the addition of Ca, compared to that of bulk MnAs (T{sub C} ∼ 318 K). The maxima magnetoresistance, ∼2.08% at 0.7 T, was observed near the critical magnetic transition temperature. Moreover, the giant magnetocaloric effect was found with the maximum magnetic entropy change, ∼200 J/kgK, around 330 K at 5 T.

• OSTI ID: 22273768
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
CALCIUM COMPOUNDS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
CURIE POINT
ENTROPY
FERROMAGNETISM
MAGNETIC PROPERTIES
MAGNETORESISTANCE
MANGANESE ARSENIDES
MOLECULAR BEAM EPITAXY
SUBSTRATES
TEMPERATURE DEPENDENCE
THIN FILMS