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Magnetocaloric effect in the intermetallic compound DyNi

DSpace at IIT Bombay

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Title Magnetocaloric effect in the intermetallic compound DyNi
 
Creator TRIPATHY, SK
SURESH, KG
NIRMALA, R
NIGAM, AK
MALIK, SK
 
Subject magnetic-properties
refrigeration
crystal
phases
metamagnetism
devil's staircase
heat capacity
magnetocaloric effect
magnetic refrigeration
 
Description Magnetic and heat capacity measurements have been carried out on the polycrystalline sample of DyNi, which crystallizes in the orthorhombic FeB structure (space group Pnma). This compound is ferromagnetic with a Curie temperature of 59 K. Magnetization-field isotherms at low temperatures show a multi-step behavior characteristic of metamagnetic transitions. The magnetocaloric effect has been measured both in terms of isothermal magnetic entropy change and adiabatic temperature change for various applied magnetic fields. The maximum values of the entropy change and the temperature change are found to be 19 J kg(-1) K-1 and 4.5 K, respectively, for a field of 60 kOe. The large magnetocaloric effect is attributed to the field-induced spin-flop metamagnetism occurring in this compound, which has a noncollinear magnetic structure at low fields. (c) 2005
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-25T12:26:36Z
2011-12-26T12:57:04Z
2011-12-27T05:46:48Z
2011-08-25T12:26:36Z
2011-12-26T12:57:04Z
2011-12-27T05:46:48Z
2005
 
Type Article
 
Identifier SOLID STATE COMMUNICATIONS, 134(5), 323-327
0038-1098
http://dx.doi.org/10.1016/j.ssc.2005.01.047
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11016
http://hdl.handle.net/10054/11016
 
Language en