Giant inverse magnetocaloric effect near room temperature in Co substituted NiMnSb Heusler alloys
arXiv:1006.0072 · doi:10.1088/0022-3727/42/3/035009
Abstract
The effect of Co on the structural, magnetic and magnetocaloric effect (MCE) of Ni50-xCoxMn38Sb12 (x=0,2,3,4,5) Heusler alloys was studied. Using x-ray diffraction, we show the evolution of the martensitic phase from the austenite phase. The martensitic transition temperature is found to decrease monotonically with Co concentration. Remarkable enhancement of MCE is observed near room temperature upon Co substitution. The maximum magnetic entropy change of 34 Jkg-1K-1 was achieved in x=5 at 262 K in a field of 50 kOe and a value of 29 Jkg-1K-1 found near room temperature. The significant increase in the magnetization associated with the reverse martensitic transition is responsible for the giant MCE in these compounds.
14 pages, 5 figures
References in corpus (4)
- Effect of Co and Fe on the inverse magnetocaloric properties of Ni-Mn-Sn
- Effects of hydrostatic pressure on the magnetism and martensitic transition of Ni-Mn-In magnetic superelastic alloys
- Room Temperature Magnetocaloric Effect in Ni-Mn-In
- Tailoring magnetic and magnetocaloric properties of martensitic transitions in ferromagnetic Heusler alloys
Cited by in corpus (9)
- Pressure induced magnetic and magnetocaloric properties in NiCoMnSb Heusler alloy
- Observation of enhanced exchange bias behavior in NiCoMnSb Heusler alloys
- Irreversibility of field-induced magnetostructural transition in NiCoMnSb shape memory alloy revealed by magnetization, transport and heat capacity studies
- Understanding the origin of the magneto-caloric effects in substitutional Ni-Mn-Sb-Z (Z=Fe, Co, Cu) compounds: insights from first-principles calculations
- High T ferromagnetic inverse Heusler alloys: A comparative study of FeRhSi and FeRhGe
- Giant magnetocaloric effect driven by first-order magneto-structural transition in cosubstituted Ni-Mn-Sb Heusler compounds: predictions from \textit{Ab initio} and Monte Carlo calculations
- Influence of the martensitic transformation kinetics on the magnetocaloric effect in Ni-Mn-In
- Field dependent neutron diffraction study in Ni50Mn38Sb12 Heusler alloy
- Observation of inverse magnetocaloric effect in magnetic-field-induced austenite phase of Heusler Alloys Ni50-xCoxMn31.5Ga18.5 (x = 9 and 9.7)