High/low-moment phase transition in hexagonal Mn-Fe-P-Si compounds

N. H. Dung, L. Zhang, Z. Q. Ou, L. Zhao, L. van Eijck, A. M. Mulders, M. Avdeev, E. Suard, N. H. van Dijk, and Ekkes Brück
Phys. Rev. B 86, 045134 – Published 27 July 2012

Abstract

Using high-resolution neutron diffraction measurements for Mn-rich hexagonal Mn-Fe-P-Si compounds, we show that the substitution of Mn for Fe on the 3f sites results in a linear decrease of the Fe/Mn(3f) magnetic moments, while the Mn(3g) magnetic moments remain constant. With increasing temperature, the Mn(3g) magnetic moments show almost no change, while the Fe/Mn(3f) moments decrease quickly when the transition temperature is approached. The reduction of the magnetic moments at the transition temperature and in the high-temperature range is discussed based on changes in interatomic distances and lattice parameters and high-temperature magnetic-susceptibility measurement.

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  • Received 23 September 2011

DOI:https://doi.org/10.1103/PhysRevB.86.045134

©2012 American Physical Society

Authors & Affiliations

N. H. Dung1,*, L. Zhang1,2, Z. Q. Ou1, L. Zhao3, L. van Eijck4, A. M. Mulders5, M. Avdeev6, E. Suard7, N. H. van Dijk1, and Ekkes Brück1

  • 1Fundamental Aspects of Materials and Energy, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, Netherlands
  • 2BASF Nederland B.V., Strijkviertel 67, 3454 PK De Meern, Netherlands
  • 3Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, Netherlands
  • 4Neutron and Positron Methods in Materials, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, Netherlands
  • 5The University of New South Wales in Canberra, Canberra, Australian Capital Territory 2600, Australia
  • 6Bragg Institute, Australian Nuclear Science and Technology Organization (ANSTO), Kirrawee DC NSW 2232, Australia
  • 7Institut Laue Langevin (ILL), F-38042 Grenoble, France

  • *Corresponding author: h.d.nguyen@tudelft.nl

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Vol. 86, Iss. 4 — 15 July 2012

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