Large reversible magnetic entropy change in rapidly solidified Ni0.895Cr0.105MnGe1.05 melt-spun ribbons
- Southern Illinois Univ., Carbondale, IL (United States)
- Univ. Autónoma de Ciudad Juárez (UACJ), Chihuahua (Mexico)
- Inst. Potosino de Investigación Científica y Tecnológica A.C., San Luis Potosi (Mexico)
- Louisiana State Univ., Baton Rouge, LA (United States)
The crystal structure, and magnetic and magnetocaloric properties of rapidly solidified Ni0.895Cr0.105MnGe1.05 melt-spun ribbons is reported. The ribbon samples crystallize into a single-phase hexagonal Ni2In-type structure at room temperature. The as-quenched ribbons showed a second order magnetic transition at 192 ± 1 K at μoH = 5 mT. A magnetic-field-induced transition from an antiferromagnetic (AFM)-like to a ferromagnetic (FM) state of martensite structure was observed in annealed ribbons below the temperature of the martensitic transformation (TM ~ 245 ± 1 K). The annealed ribbons undergo a first-order magnetostructural transition (MST) with a large maximum reversible magnetic entropy change of ΔSM = 16.1 J kg–1 K–1 (this is about a four-fold increase compared to the ΔSM observed for the bulk sample of the same nominal composition) and RC = 144 J kg–1 for μoΔH = 5 T at temperature T = TM ~ 245 ± 1 K. The increase in the ΔSM peak value leads to an improved RC compared to that of the bulk sample (122 J kg1). Furthermore, the observed MCE and quasi-reversible character of ΔSM at the MST illustrates the potential of Ni0.895Cr0.105MnGe1.05 ribbons for magnetic cooling technology.
- Research Organization:
- Louisiana State Univ., Baton Rouge, LA (United States); Southern Illinois Univ., Carbondale, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); CONACYT
- Grant/Contract Number:
- FG02-13ER46946; SC0010521; FG02-06ER46291 (SIU); FG02-13ER46946 (LSU)
- OSTI ID:
- 1872886
- Alternate ID(s):
- OSTI ID: 1548486
- Journal Information:
- Intermetallics, Vol. 97; ISSN 0966-9795
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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