Title :
Magnetocaloric Effect in ErSi Compound
Author :
Xu, Z.Y. ; Shen, Jianbing ; Zheng, X.Q. ; Zhang, Haijun
Author_Institution :
State Key Lab. of Magn., Chinese Acad. of Sci., Beijing, China
Abstract :
The magnetic properties and magnetocaloric effects (MCEs) have been investigated in ErSi compound, which crystallizes in the orthorhombic CrB-type structure. This compound is antiferromagnetic (AFM) with a Néel temperature TN of 12.5 K. The measurements of the temperature and field dependences of the magnetization clearly show that the ErSi compound undergoes a field-induced metamagnetic transition from AFM to ferromagnetic (FM) state below TN. The isothermal magnetic entropy change (ΔSM) and refrigerant capacity (RC) of ErSi have been measured for various applied magnetic fields and their values are found to be -14.8J ·kg -1·K -1 and 210 J ·kg -1 for a field change of 0-5 T, respectively. The large MCE is attributed to the field-induced AFM to FM metamagnetism occurring in this compound.
Keywords :
Neel temperature; antiferromagnetic materials; crystal structure; crystallisation; erbium alloys; ferromagnetic materials; ferromagnetic-antiferromagnetic transitions; magnetisation; magnetocaloric effects; metamagnetism; refrigerants; silicon alloys; Neel temperature; antiferromagnetic compound; antiferromagnetic-ferromagnetic state transition; crystallization; field-induced metamagnetic transition; isothermal magnetic entropy change; magnetization; magnetocaloric effect; orthorhombic CrB-type structure; refrigerant capacity; Compounds; Frequency modulation; Magnetization; Materials; Saturation magnetization; Temperature dependence; Temperature measurement; Antiferromagnetic (AFM) materials; magnetic refrigeration; magnetocaloric effect (MCE);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2153837
