Magnetocaloric effect of Mn5+xGe3-x alloys

Title
Magnetocaloric effect of Mn5+xGe3-x alloys
Authors
윤종승
Keywords
Magnetocaloric effect; Mn5Ge3
Issue Date
2015-01
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v. 620, Page. 164-167
Abstract
Magnetic properties and magnetocaloric effect (MCE) of off-stoichiometric Mn5+xGe3-x (x = -0.1 and 0.3) were studied. Depletion of Mn (x = -0.1) decreased the magnetic moment of the compound due to the reduction of the ferromagnetic Mn-Mn interactions. Mn5.1Ge2.9 appeared to be near the optimal composition since Mn5.1Ge2.9 exhibited increase in the magnetic moment compared to the stoichiometric compound and further Mn-enrichment beyond x = 0.1 led to the formation of the weakly magnetic secondary phase. Mn5.1Ge2.9 produced the maximum entropy change of 2.9 J kg (1) K (1) at 296 K and the refrigeration capacity of 44.5 J kg (1) with an applied field of 10 kOe, making Mn5.1Ge2.9 a possible candidate magnetic refrigerant with reasonably high magnetic entropy change and negligible hysteresis.
URI
http://hdl.handle.net/20.500.11754/21109http://www.sciencedirect.com/science/article/pii/S0925838814021689
ISSN
0925-8388
DOI
http://dx.doi.org/10.1016/j.jallcom.2014.09.034
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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