کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1811569 | 1025598 | 2010 | 4 صفحه PDF | دانلود رایگان |
In the present work, the magnetic entropy change of the half-doped Nd0.5Ca0.25Sr0.25MnO3 manganite has been investigated. The measurement of isothermal magnetization around Curie temperature reveals the maximum isothermal magnetic entropy change of 1.85 and 0.77 J/kg K for ΔH=3.0ΔH=3.0 and 1.0 T magnetic field variation, respectively. In addition, from the data of heat capacity, we find the adiabatic temperature change of 0.88 K for a magnetic field variation of 3.0 T. Though only a moderate magnetic entropy change and a small adiabatic temperature change were obtained, a considerable large relative cooling power (140 J/kg as ΔH=3.0T) and a wide temperature range (74 K as ΔH=3.0T) were found in this sample, this ensure it to be a promising candidate for the actual magnetic refrigerant materials.
Journal: Physica B: Condensed Matter - Volume 405, Issue 15, 1 August 2010, Pages 3120–3123