Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

7-1-2012

Journal or Book Title

Physical Review B

Volume

86

Issue

1

First Page

014422

DOI

10.1103/PhysRevB.86.014422

Abstract

We use high-pressure magnetic x-ray diffraction and numerical simulation to determine the low-temperature magnetic phase diagram of stoichiometric CeFe2. Near 1.5 GPa we find a transition from ferromagnetism to antiferromagnetism, accompanied by a rhombohedral distortion of the cubic Laves crystal lattice. By comparing pressure and chemical substitution we find that the phase transition is controlled by a shift of magnetic frustration from the Ce-Ce to the Fe-Fe sublattice. Notably the dominant Ce-Fe magnetic interaction, which sets the temperature scale for the onset of long-range order, remains satisfied throughout the phase diagram but does not determine the magnetic ground state. Our results illustrate the complexity of a system with multiple competing magnetic energy scales and lead to a general model for magnetism in cubic Laves phase intermetallic compounds.

Comments

This article is published as Wang, Jiyang, Yejun Feng, R. Jaramillo, Jasper van Wezel, Paul C. Canfield, and T. F. Rosenbaum. "Pressure tuning of competing magnetic interactions in intermetallic CeFe 2." Physical Review B 86, no. 1 (2012): 014422. DOI: 10.1103/PhysRevB.86.014422. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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