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First-order magnetic transition in Yb2Ti2O7

Lhotel, E., Giblin, Sean, Lees, M. R., Balakrishnan, G., Chang, L. J. and Yasui, Y. 2014. First-order magnetic transition in Yb2Ti2O7. Physical Review B Condensed Matter and Materials Physics 89 (22) , 224419. 10.1103/PhysRevB.89.224419

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Abstract

The very nature of the ground state of the pyrochlore compound Yb 2 Ti 2 O 7 is much debated, because experimental results demonstrate evidence for either a disordered ground state or a long-range ordered ground state. Indeed, the delicate balance of exchange interactions and anisotropy is believed to lead to competing states, such as a quantum spin liquid state or a ferromagnetic state which may originate from an Anderson-Higgs transition. We present a detailed magnetization study demonstrating a first-order ferromagnetic transition at 245 and 150 mK in a powder and a single-crystal sample, respectively. Its first-order character is preserved up to applied fields of ∼200 Oe. The transition stabilizes a ferromagnetic component and involves slow dynamics in the magnetization. Residual fluctuations are also evidenced, the presence of which might explain some of the discrepancies between previously published data for Yb 2 Ti2 O7.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 28 Jun 2019 13:39
URI: http://orca.cf.ac.uk/id/eprint/75984

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