Giant Magnetocaloric Effect in Gd{sub 5}(Si{sub 2}Ge{sub 2})

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.4494· OSTI ID:548842

Pecharsky, V K; Gschneidner, Jr, K A ^[1]

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1. Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020 (United States)

An extremely large magnetic entropy change has been discovered in Gd{sub 5}(Si{sub 2}Ge{sub 2}) when subjected to a change in the magnetic field. It exceeds the {ital reversible} (with respect to an alternating magnetic field) magnetocaloric effect in any known magnetic material by at least a factor of 2, and it is due to a first order [ferromagnetic (I){leftrightarrow}ferromagnetic (II)] phase transition at 276K and its unique magnetic field dependence. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 548842
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ENTROPY
GADOLINIUM ALLOYS
GERMANIUM ALLOYS
MAGNETIC REFRIGERATORS
MAGNETIC SUSCEPTIBILITY
PHASE TRANSFORMATIONS
SILICON ALLOYS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE