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Magnetothermal Properties of Dy5(SixGe1−x)4 Alloys

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Advances in Cryogenic Engineering Materials

Abstract

A study of a series of Dy5(SixGe1−x)4 alloys using dc and ac magnetic susceptibility, magnetization, heat capacity, and x-ray powder diffraction techniques revealed that the variation of the magnetic properties and crystal structure with composition is similar to that observed in the Gd5(SixGe1−x)4 system, except that the magnetic ordering temperatures are lower. The magnetic phase transition temperatures vary from ∼ 46 K (Dy5Ge4) to ∼ 137 K (Dy5Si4). The intermediate ternary phase Dy5(Si3Ge) undergoes a first order magnetic phase transition at ∼ 65 K. The value of magnetic entropy change for this composition is quite large (−34 J/kgK for magnetic field change from 0 to 5T), compared to the values for the two end members (−7 for Dy5Ge4 and −12.5 J/kgK for Dy5Si4). The Dy5(SixGe1−x)4 alloys, where 0.67≤x≤1, may be useful magnetic refrigerant materials in the ∼50 to ∼160K temperature range.

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Authors and Affiliations

  1. Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011-3020, USA

    V. V. Ivtchenko, V. K. Pecharsky & K. A. Gschneidner Jr.

Authors
  1. V. V. Ivtchenko
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  2. V. K. Pecharsky
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  3. K. A. Gschneidner Jr.
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Editor information

Editors and Affiliations

  1. Argonne National Laboratory, Argonne, Illinois, USA

    U. Balu Balachandran

  2. Texas A&M University, College Station, Texas, USA

    K. Ted Hartwig

  3. Naval Research Laboratory, Washington, D.C., USA

    Donald U. Gubser

  4. Synchrony, Bordentown, New Jersey, USA

    Victoria A. Bardos

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© 2000 Kluwer Academic/Plenum Publishers, New York

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Ivtchenko, V.V., Pecharsky, V.K., Gschneidner, K.A. (2000). Magnetothermal Properties of Dy5(SixGe1−x)4 Alloys. In: Balachandran, U.B., Hartwig, K.T., Gubser, D.U., Bardos, V.A. (eds) Advances in Cryogenic Engineering Materials . Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4293-3_52

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  • DOI: https://doi.org/10.1007/978-1-4615-4293-3_52

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6926-4

  • Online ISBN: 978-1-4615-4293-3

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