Magnetocaloric effect of Mn5+xGe3-x alloys
- Authors
- Kim, Yongdeok; Kim, Eun Jeong; Choi, Kwangseok; Han, Won Bae; Kim, Hee-Soo; Yoon, Chong Seung
- Issue Date
- Jan-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Magnetocaloric effect; Mn5Ge3
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.620, pp.164 - 167
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 620
- Start Page
- 164
- End Page
- 167
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/25683
- DOI
- 10.1016/j.jallcom.2014.09.034
- ISSN
- 0925-8388
- 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. (C) 2014 Elsevier B.V. All rights reserved.
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