Structural, Magnetic and Magnetocaloric Properties of High-Energy Ball-Milled Gd{sub 5}Si{sub 2}Ge{sub 2}B{sub 0.05} Alloy
Structural, magnetic and magnetocaloric properties of Gd{sub 5}Si{sub 2}Ge{sub 2}B{sub 0.05} alloy, ball milled for different time intervals in the range of 2–50 h were studied. The x-ray powder diffraction analysis of the alloy prior to milling revealed the presence of mixed orthorhombic and monoclinic phases at room temperature. For a milling duration up to 15 h, the alloy powder displayed crystalline nature. Upon further milling, the alloy powder started to lose the crystallinity and after 50 h of milling, the alloy powder displayed amorphous nature. The average particle size of milled samples was found to decrease with increase in milling time. The saturation magnetization value of the bulk alloy 80 emu/g was found to decrease with increase in milling time due to structural disorder. The transition temperature of the milled alloy powder was found to be around 295 K and the transition was found to become broader with increase in milling time. A maximum isothermal entropy change (ΔS{sub max}) of ∼12 J/kg K was obtained in bulk alloy. For a milling duration of 2 h, a marginal decrease of ΔS{sub max} (∼11 J/kg K) was obtained. Whereas, for higher milling durations, (≥ 15 h) a significant decrease in ΔS{sub max} values were observed. However, the broad operating temperature range of the milled powders can be exploited for magnetic refrigeration applications.
- OSTI ID:
- 22919613
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 2; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetism and magnetocaloric effect in multicomponent Laves-phase compounds: Study and comparative analysis
Table-like magnetocaloric effect in Gd{sub 56}Ni{sub 15}Al{sub 27}Zr{sub 2} alloy and its field independence feature
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON COMPOUNDS
CRYSTAL STRUCTURE
GADOLINIUM COMPOUNDS
GERMANIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
QUATERNARY ALLOY SYSTEMS
SATURATION
SILICON COMPOUNDS
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION