Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-02-08
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages
Scientific paper
10.1016/j.ssc.2005.01.047
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 shows a step-like 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 Jkg-1K-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.
Malik* S. K.
Nigam A. K.
Nirmala R.
Suresh K. G.
Tripathy Sunil Kumar
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