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Type: Artigo de periódico
Title: Pressure-induced Colossal Magnetocaloric Effect In Mnas.
Author: Gama, Sergio
Coelho, Adelino A
de Campos, Ariana
Carvalho, A Magnus G
Gandra, Flávio C G
von Ranke, Pedro J
de Oliveira, Nilson A
Abstract: To present day, the maximum magnetocaloric effect (MCE) at room temperature for a magnetic field change of 5 T is 40 J/(kg K) for MnAs. In this Letter we present colossal MCE measurements on MnAs under pressure, reaching values up to 267 J/(kg K), far greater than the magnetic limit arising from the assumption of magnetic field independence of the lattice and electronic entropy contributions. The origin of the effect is the contribution to the entropy variation coming from the lattice through the magnetoelastic coupling.
Rights: aberto
Identifier DOI: 
Date Issue: 2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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