کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1593067 | 1002684 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic properties and magnetocaloric effects in Gd1−xHoxNiIn intermetallic compounds Magnetic properties and magnetocaloric effects in Gd1−xHoxNiIn intermetallic compounds](/preview/png/1593067.png)
Magnetic properties and magnetocaloric effects (MCEs) of the intermetallic Gd1−xHoxNiIn (x=0−1) compounds have been evaluated by magnetization and heat capacity measurements. The Curie temperature TC can be tuned from near 100 K to 20 K by substituting Ho for Gd atoms. In addition, all the compounds with Ho atoms undergo two successive magnetic transitions with the decrease of temperature: a paramagnetic (PM) to ferromagnetic (FM) transition around TC and a spin-reorientation (SR) transition around 7−9 K. It is found that both transitions contribute to the magnetic entropy change (ΔSM). For a field change of 5 T, the maximum values of −ΔSM for Gd0.4Ho0.6NiIn are 6 J/kg K at Tt=9 K and 10 J/kg K at TC=52 K, respectively. These two −ΔSM peaks overlap partly and result in a wide working temperature range of MCE, and thus leading to the largest RC value of 443 J/kg in the Gd1−xHoxNiIn system.
► The Curie temperature TC can be tuned from near 100 K to 20 K by substitution.
► All the compounds with Ho undergo a phase transition at low temperature of 7−9 K.
► The maximum value of −ΔSM increases largely with increasing Ho concentration.
► Suitable working temperature and large MCE properties can be realized.
Journal: Solid State Communications - Volume 152, Issue 18, September 2012, Pages 1734–1738