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Journal of Materials Science

, Volume 32, Issue 21, pp 5743–5747 | Cite as

Single crystals of RAlO3 (R: Dy, Ho and Er) for use in magnetic refrigeration between 4.2 and 20 K

  • H KIMURA
  • T NUMAZAWA
  • M SATO
  • T IKEYA
  • T FUKUDA
  • K FUJIOKA
Article

Abstract

Single crystals of RAlO3 (R: Dy, Ho and Er) were grown using the Czochralski technique. The magnetization of the single crystals along the a-, b- and c-axes was measured in the paramagnetic region using a superconducting quantum interference device (SQUID) magnetometer. Using these values of the magnetization, the magnetic entropy change, which depends on the crystal axis direction, was calculated. Single crystals of DyAlO3 oriented along the b-axis and c-axis oriented ErAlO3 single crystals are promising materials for use in magnetic refrigeration systems using the Carnot cycle in the temperature range between 4.2 and 20 K.

Keywords

Refrigeration System Magnetic Entropy Change Superconducting Quantum Interference Device Magnetic Refrigerant Carnot Cycle 

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References

  1. 1.
    A. F. LACAZE, R. BERANGER, G. BON MARDION, G. CLAUDET and A. A. LACAZE, Cryogenics 23 (1983) 427.CrossRefGoogle Scholar
  2. 2.
    T. NUMAZAWA, H. KIMURA, M. SATO and H. MAEDA, ibid. 33 (1993) 547.CrossRefGoogle Scholar
  3. 3.
    M. D. KUZ’MIN and A. M. TISHIN, J. Phys. D: Appl. Phys. 24 (1991) 2039.CrossRefGoogle Scholar
  4. 4.
    H. KIMURA, T. NUMAZAWA, M. SATO, T. IKEYA and T. FUKUDA, J. Appl. Phys. 77 (1995) 432.CrossRefGoogle Scholar
  5. 5.
    JCPDS cards. DyA1O3 (39-1437), HoA1O3 (24-470) and ErA1O3 (24-396).Google Scholar
  6. 6.
    Y. OKANO, T. IKEYA, K. HOSHIKAWA and T. FUKUDA, J. Cryst. Growth 131 (1993) 616.CrossRefGoogle Scholar
  7. 7.
    H. SCHUCHERT, S. HUFNER and R. FAULHABER, Z. Physik 222 (1969) 105.CrossRefGoogle Scholar
  8. 8.
    J. SIVARDIERE and S. QUUEZEL-AMBRUNAZ, C.R. Acad. Sci. Paris 273 (1971) 619.Google Scholar
  9. 9.
    T. HASHIMOTO, T. NUMAZAWA, M. SHINO and T. OKADA, Cryogenics 21 (1981) 647.CrossRefGoogle Scholar
  10. 10.
    R. LI, T. NUMAZAWA, T. HASHIMOTO, A. TOMOKIYO, T. GOTO and S. TODO, Advan. Cryo. Engng. Mater. 32 (1986) 287.CrossRefGoogle Scholar
  11. 11.
    T. NUMAZAWA, H. KIMURA, M. SATO, T. IKEYA, K. SHIMAMURA and T. FUKUDA, J. Mater. Sci. (in press).Google Scholar

Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • H KIMURA
    • 1
  • T NUMAZAWA
    • 1
  • M SATO
    • 1
  • T IKEYA
    • 2
  • T FUKUDA
    • 2
  • K FUJIOKA
    • 3
  1. 1.National Research Institute for MetalsIbarakiJapan
  2. 2.Institute for Materials ResearchTohoku UniversitySendaiJapan
  3. 3.Daido Hoxan Inc.IbarakiJapan

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