Untypical Temperature Dependence of the Magnetocaloric Effect in the Dy(Co_1-xFe_x)₂ (x = 0.10; 0.15) Compounds

Abstract:

A study of crystalline structure, magnetic and magnetocaloric properties of Dy(Co_1-хFe_х)₂ (х = 0.10, 0.15) intermetallic compounds was undertaken. Phase composition was controlled by X-ray diffraction analysis. Magnetic properties were measured with a help of SQUID magnetometer in magnetic fields up to 7 Т in the temperature range from 4.2 K to 400 K. Magnetic transition temperatures from paramagnetic to magnetically ordered state were inferred as 288 K and 350 K, respectively. It is shown that at an increase of iron concentration and/or magnetic field intensity, a considerable maximum broadenings on a temperature dependence of magnetic entropy change is observed. The calculated value of the relative cooling power (RCP) of Dy(Co_0.90Fe_0.10)₂, in a magnetic field of 1.7 T is equal to 152 J/kg that is close to that for Gd metal with RCP = 181 J/kg at μ₀Н = 2 T.

• Periodical: Solid State Phenomena (Volumes 233-234)
• Pages: 247-250
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.233-234.247
• Online since: July 2015
• Authors: Maksim S. Anikin, Evgeniy N. Tarasov, Nikolay V. Kudrevatykh, Aleksander V. Zinin
• Keywords: Entropy, Heat Capacity, Intermetallic, Magnetic Measurements, Magnetocaloric Effect

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