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  Influence of Cr substitution on the reversibility of the magnetocaloric effect in Ni-Cr-Mn-In Heusler alloys

Salazar-Mejía, C., Devi, P., Singh, S., Felser, C., & Wosnitza, J. (2021). Influence of Cr substitution on the reversibility of the magnetocaloric effect in Ni-Cr-Mn-In Heusler alloys. Physical Review Materials, 5(10): 104406, pp. 1-8. doi:10.1103/PhysRevMaterials.5.104406.

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Salazar-Mejía, C.1, Author
Devi, P.2, Author              
Singh, S.2, Author              
Felser, C.3, Author              
Wosnitza, J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: We present the effect of substitution-induced pressure on the reversibility of the magnetocaloric effect (MCE) in Ni2CrxMn1.4-xIn0.6 (x = 0.1, 0.2, 0.3) alloys, through characterization in pulsed magnetic fields. We measured the adiabatic temperature change Delta T-ad directly during applied magnetic field pulses of 2 and 6 T. We paid special attention to the reversibility of Delta T-ad. The substitution of Mn by Cr in Ni2Mn1.4In0.6 leads to a negative pressure, as evidence by the increase of the lattice parameters, which shifts the martensitic transition towards lower temperatures and enhances the ferromagnetism of the martensite phase. We found a large value of Delta T-ad = -7 K at T = 270 K for the sample with x = 0.1 for a field change of 6 T. We discuss the reversibility of the MCE in these alloys in terms of the Clausius-Clapeyron equation.

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Language(s): eng - English
 Dates: 2021-10-132021-10-13
 Publication Status: Published in print
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Title: Physical Review Materials
  Abbreviation : Phys. Rev. Mater.
Source Genre: Journal
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Publ. Info: College Park, MD : American Physical Society
Pages: - Volume / Issue: 5 (10) Sequence Number: 104406 Start / End Page: 1 - 8 Identifier: ISSN: 2475-9953
CoNE: https://pure.mpg.de/cone/journals/resource/2475-9953