Competing interactions and magnetic frustration in Yb4LiGe4

Disseler, S. M., Svensson, J. N, Peter, S. C., Byers, C. P., Baines, C., Amato, A., Giblin, Sean ORCID: https://orcid.org/0000-0003-1876-8619, Carretta, P. and Graf, M. J. 2011. Competing interactions and magnetic frustration in Yb4LiGe4. Physical Review B Condensed Matter and Materials Physics 84 (17) , 174429.

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Abstract

We have studied polycrystalline Yb4LiGe4, a ternary variant of the R5T4 family of layered compounds characterized by a very strong coupling between the magnetic and crystallographic degrees of freedom. The system is mixed valent, with nonmagnetic Yb2+ and magnetic Yb3+ present, and is characterized by coexisting ferromagnetic (FM) and antiferromagnetic (AFM) correlations. We present measurements of resistivity, AC-susceptibility, specific heat, and muon spin relaxation (μSR), below 1 K. The low temperature measurements suggest a transition to a mesoscopically inhomogeneous magnetically ordered state below 2 K characterized by fluctuations well below the ordering temperature. This unusual state is believed to result from the enhanced two-dimensionality produced by Li substitution and frustration effects inherent in the Yb-sublattice geometry.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	21 Oct 2022 10:51
URI:	https://orca.cardiff.ac.uk/id/eprint/41518

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