Magnetic phase diagram of Ce2Fe17

Y. Janssen, S. Chang, A. Kreyssig, A. Kracher, Y. Mozharivskyj, S. Misra, and P. C. Canfield
Phys. Rev. B 76, 054420 – Published 10 August 2007

Abstract

Rare-earth-based permanent-magnet materials rich in iron have relatively low ferromagnetic ordering temperatures. This is believed to be due to the presence of antiferromagnetic exchange interactions, besides the ferromagnetic interactions responsible for the magnetic order. The magnetic properties of Ce2Fe17 are anomalous. Instead of ferromagnetic, it is antiferromagnetic, and instead of one ordering temperature, it shows two, at the Néel temperature TN208K and at Tt124K. Ce2Fe17, doped by 0.5% Ta, also shows two ordering temperatures, one to an antiferromagnetic phase, at TN214K, and one to a ferromagnetic phase, at T075K. In order to clarify this behavior, single-crystalline samples were prepared by solution growth and characterized by electron microscopy, single-crystal x-ray diffraction, temperature-dependent specific heat, and magnetic field and temperature-dependent electrical resistivity and magnetization. From these measurements, magnetic HT phase diagrams were determined for both Ta-doped Ce2Fe17 and undoped Ce2Fe17. These phase diagrams can be very well described in terms of a theory that gives magnetic phase diagrams of systems with competing antiferro- and ferromagnetism.

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  • Received 22 December 2006

DOI:https://doi.org/10.1103/PhysRevB.76.054420

©2007 American Physical Society

Authors & Affiliations

Y. Janssen*, S. Chang, A. Kreyssig, and A. Kracher

  • Ames Laboratory, U.S. DOE, Ames, Iowa 50011, USA

Y. Mozharivskyj

  • Department of Chemistry, McMaster University, Hamilton, Ontario, Canada L8S 4M1

S. Misra

  • Ames Laboratory, U.S. DOE, Ames, Iowa 50011, USA and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA

P. C. Canfield

  • Ames Laboratory, U.S. DOE, Ames, Iowa 50011, USA and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • *Present address: Brookhaven National Laboratory, Upton, NY 11973, USA; yjanssen@bnl.gov

See Also

Crystallographic phase transition within the magnetically ordered state of Ce2Fe17

A. Kreyssig, S. Chang, Y. Janssen, J. W. Kim, S. Nandi, J. Q. Yan, L. Tan, R. J. McQueeney, P. C. Canfield, and A. I. Goldman
Phys. Rev. B 76, 054421 (2007)

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Vol. 76, Iss. 5 — 1 August 2007

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