Co doping enhanced giant magnetocaloric effect in Mn{sub 1-x}Co{sub x}As films epitaxied on GaAs (001)

Journal Article · Mon Jul 26 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3467467· OSTI ID:21367027

Xu, P F; Nie, S H; Meng, K K; Wang, S L; Chen, L; Zhao, J H ^[1]

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1. State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 (China)

A giant magnetocaloric effect was found in series of Mn{sub 1-x}Co{sub x}As films epitaxied on GaAs (001). The maximum magnetic entropy change caused by a magnetic field of 4 T is as large as 25 J/kg K around room temperature, which is about twice the value of pure MnAs film. The observed small thermal hysteresis is more suitable for practical application. Growing of layered Mn{sub 1-x}Co{sub x}As films with Co concentration changing gradually may draw layered active magnetic regenerator refrigerators closer to practical application. Our experimental result may provide the possibility for the combination of magnetocaloric effect and microelectronic circuitry.

• OSTI ID: 21367027
• Journal Information: Applied Physics Letters, Vol. 97, Issue 4; Other Information: DOI: 10.1063/1.3467467; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT COMPOUNDS
CRYSTAL GROWTH
ENTROPY
FILMS
GALLIUM ARSENIDES
HYSTERESIS
LAYERS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MANGANESE ARSENIDES
MOLECULAR BEAM EPITAXY
REFRIGERATORS
TEMPERATURE RANGE 0273-0400 K
ARSENIC COMPOUNDS
ARSENIDES
CRYSTAL GROWTH METHODS
EPITAXY
GALLIUM COMPOUNDS
MANGANESE COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS