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Magnetic Behaviour of RCu4Al (R = Rare Earth) Intermetallic Compounds II

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The Rare Earths in Modern Science and Technology

Abstract

Intermetallic compounds of the general formula RCu4Al, where R = La,Ce,Pr,Nd,Sm,Gd,Tb,Dy,Ho,Er and Tm, have been prepared and are found to crystallize in the hexagonal CaCu5 type structure. Magnetization measurements on these compounds have been carried out in the temperature range 4.2 to 300 K. The compounds with Gd, Tb,Dy and Ho have been reported earlier (1) to order antiferromagnetically at low temperatures. There is no conclusive evidence about magnetic ordering in the remaining RCu4Al compounds from magnetization measurements in 21 k0e applied field. Deviation from Curie-Weiss behaviour, at low temperatures, is observed in Er and Tm compounds and is attributed to crystal field effects. The effective paramagnetic moments are close to free ion value except for the Ce and Pr compounds. The paramagnetic Curie temperatures are negative for Ce,Pr and Gd compounds and positive for the remaining compounds. The results are discussed and compared with those on RCU5 and RCu4Ag compounds.

Work supported by the Army Research Office.

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References

  1. S. K. Malik, T. Takeshita and W. E. Wallace, in “Rare Earths in Modern Science and Technology,” edited by G. J. McCarthy and J. J. Rhyne, Plenum Press, New York and London (1978), pp. 429–434.

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Author notes

  1. S. K. Malik

    Present address: Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay, 400 005, India

  2. T. Takeshita

    Present address: Ames Laboratory-DOE and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa, 50011, USA

Authors and Affiliations

  1. Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA

    S. K. Malik, W. E. Wallace & T. Takeshita

Authors
  1. S. K. Malik
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  2. W. E. Wallace
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  3. T. Takeshita
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Editor information

Editors and Affiliations

  1. North Dakota State University, Fargo, North Dakota, USA

    Gregory J. McCarthy

  2. Pennsylvania State University, University Park, Pennsylvania, USA

    Gregory J. McCarthy

  3. National Bureau of Standards, Washington, D.C., USA

    James J. Rhyne

  4. University of Texas at San Antonio, San Antonio, Texas, USA

    Herbert B. Silber

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© 1980 Plenum Press, New York

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Malik, S.K., Wallace, W.E., Takeshita, T. (1980). Magnetic Behaviour of RCu4Al (R = Rare Earth) Intermetallic Compounds II. In: McCarthy, G.J., Rhyne, J.J., Silber, H.B. (eds) The Rare Earths in Modern Science and Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3054-7_64

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  • DOI: https://doi.org/10.1007/978-1-4613-3054-7_64

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-3056-1

  • Online ISBN: 978-1-4613-3054-7

  • eBook Packages: Springer Book Archive

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