Preparation, crystal structure, magnetic and magnetothermal properties of (Gd{sub x}R{sub 5-x})Si{sub 4}, where R=Pr and Tb, alloys
The series of alloys (Gd{sub x}Tb{sub 5-x})Si{sub 4} (x=0,2.5,3,3.5,4,4.5,5) and (Gd{sub x}Pr{sub 5-x})Si{sub 4} (x=4,4.25,4.5) have been prepared. Their room temperature crystal structure has been established, and dc magnetization and ac magnetic susceptibility have been measured in the temperature range from 4.2 to 550 K and in dc magnetic fields up to 50 kOe. The magnetocaloric effect has been calculated from the magnetization data and, for one of the alloys, from the heat capacity data. The magnetocaloric effect values from the two different measurements are in excellent agreement. The (Gd{sub x}Tb{sub 5-x})Si{sub 4} alloys exhibit magnetocaloric effects in low magnetic fields (<20 kOe) comparable to that of Gd metal and, therefore, they represent a new class of promising magnetic refrigerant materials.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204919
- Journal Information:
- Journal of Applied Physics, Vol. 89, Issue 3; Other Information: DOI: 10.1063/1.1335821; Othernumber: JAPIAU000089000003001738000001; 097103JAP; PBD: 1 Feb 2001; ISSN 0021-8979
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
RNi{sub 8}Si{sub 3} (R=Gd,Tb): Novel ternary ordered derivatives of the BaCd{sub 11} type
Mo{sub 2}NiB{sub 2}-type (Gd, Tb, Dy){sub 2}Ni{sub 2.35}Si{sub 0.65} and La{sub 2}Ni{sub 3}-type (Dy, Ho){sub 2}Ni{sub 2.5}Si{sub 0.5} compounds: Crystal structure and magnetic properties