Effect of microstructure and texture on the magnetic and magnetocaloric properties of the melt-spun rare earth intermetallic compound DyNi

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Title
Effect of microstructure and texture on the magnetic and magnetocaloric properties of the melt-spun rare earth intermetallic compound DyNi
Author(s)
R. Rajivgandhi; J. Arout Chelvane; A.K. Nigam; Je-Geun Park; S.K. Malik; R. Nirmala
Publication Date
2016-11
Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.418, no., pp.9 - 13
Publisher
ELSEVIER SCIENCE BV
Abstract
Magnetization measurements have been carried out on the melt-spun ribbon sample of the rare earth intermetallic compound DyNi (Orthorhombic, FeB-type, Space group Pnma) and its magnetic and magnetocaloric properties are compared with those of the arc-melted analog. The arc-melted DyNi orders ferromagnetically at around 61 K (T-C) whereas the melt-spun DyNi orders ferromagnetically at about 47 K. The maximum isothermal magnetic entropy change, Delta S-III(max), near T-C of the arc-melted and the melt spun DyNi is found to be -32.7 J/kg K and -22.4 J/kg K, respectively, for a field change of 140 kOe. For low magnetic field changes of similar to 20 kOe, the relative cooling power (RCP) is similar to 660 J/kg for the arc melted DyNi and similar to 460 J/kg for the melt-spun ribbon. The reduction in T-C and magnetocaloric effect may be attributed to the microstructure-induced anisotropy developed during the melt-spinning process. (C) 2016 Elsevier B.V. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/4830
ISSN
0304-8853
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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