首页|Magnetothermal properties and magnetocaloric effect in transition Metal-Rich Gd-Co and Gd-Fe amorphous alloys
Magnetothermal properties and magnetocaloric effect in transition Metal-Rich Gd-Co and Gd-Fe amorphous alloys
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
We present a theoretical study， based on the mean-field theory， on magnetocaloric effect in both amorphous GdxCo1-x (0。16 <= x <= 0。25) and GdxFe1-x (x = 0。263 and 0。306) alloys in a temperature range up to Curie temperature and in magnetic fields up to 70 kOe。 Our calculations show a fair agreement with available experimental data which confirm ferrimagnetic order in these systems。 Both direct and inverse magnetocaloric effects are present。 For Gd0。16Co0。84， maxima of delta S-m are 1。32 and 1。62 J/kg K for magnetic field changes of 40 and 70 kOe respectively。 However， the peak values of delta S-m decrease as x increases。 Peak values of delta S-m are 0。64 and 0。82 J/K。kg for Gd(0。263)Fe(0。737 )and Gd0。306Fe0。694 respectively。 The Belov-Arrott plots， the universal curve， and temperature dependence of delta S-m for Gd-Co alloys， showed that the alloys exhibit a second order phase transition at their Curie temperatures。 The same conclusion is reached for Gd-Fe alloys。
Amorphous alloysMean-field theoryBelo v -Arrott PlotsUniversal CurvesDirect and Inverse Magnetocaloric Effect (MCE)MEAN-FIELD ANALYSISMAGNETIC-PROPERTIES
NSTL
Elsevier
