Ferromagnetism and magneto-transport properties of Mn0.92Ca0.08As thin film grown on Al2O3(0001) substrate

Ferromagnetism and magneto-transport properties of Mn0.92Ca0.08As thin film grown on Al2O3(0001) substrate

The epitaxial Mn0.92Ca0.08As thin film was grown on Al2O3(0001) substrate by molecular beam epitaxy. The Curie temperature (TC) around 340 K was enhanced with the addition of Ca, compared to that of bulk MnAs (TC ∼ 318 K). The maxima magnetoresistance, ∼2.08% at 0.7 T, was observed near the critical...

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Veröffentlicht in:Journal of applied physics 2014-05, Vol.115 (17)
Hauptverfasser: Dung, Dang Duc, Van Thiet, Duong, Anh Tuan, Duong, Feng, Wuwei, Cho, Sunglae
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
Curie temperature
Epitaxial growth
Ferromagnetism
Magnetic properties
Magnetic transitions
Magnetism
Magnetoresistance
Magnetoresistivity
Molecular beam epitaxy
Substrates
Thin films
Transition temperature
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Zusammenfassung:The epitaxial Mn0.92Ca0.08As thin film was grown on Al2O3(0001) substrate by molecular beam epitaxy. The Curie temperature (TC) around 340 K was enhanced with the addition of Ca, compared to that of bulk MnAs (TC ∼ 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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4866392