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Magnetic Field Tuning of Antiferromagnetic Yb3Pt4

Published

Author(s)

L. S. Wu, Y. Janssen, C. Marques, M. C. Bennett, M. S. Kim, K. Park, Songxue Chi, Jeffrey W. Lynn, G. Lorusso, G. Biasiol, M.C. Aronson

Abstract

We present measurements of the specific heat, magnetization, magnetocaloric effect and magnetic neutron diffraction carried out on single cyrstals of antiferromagnetic Yb3Pt4, where highly localized Yb moments order at TN = 2.4 K in zero field. The antiferromagnetic order was suppressed to TN arrow} 0 by applying a field of 1.85 T in the ab plane. Magnetocaloric effect measurements show that the antiferromagnetic phase transition is always continuous for TN great than} 0, although a pronounced step in the magnetization is observed at the critical field in both neutron diffraction and magnetization measurements. These steps sharpen with decreasing temperature, but the related divergences in the magnetic susceptibility are cut off at the lowest temperatures, where the phase line itself becomes vertical in the field-temperature plane. As TN arrow}0, the antiferromagnetic transition is increasingly influenced by a quantum critical endpoint, where TN ultimately vanishes in a first order phase transition.
Citation
Physical Review B
Volume
84
Issue
13

Keywords

Heavy Fermion, Antiferromagnet, Magnetic Field Dependence, Quantum Critical Endpoint, Neutron Diffraction, specific heat, Magnetization, Magnetocaloric Effect

Citation

Wu, L. , Janssen, Y. , Marques, C. , Bennett, M. , Kim, M. , Park, K. , Chi, S. , Lynn, J. , Lorusso, G. , Biasiol, G. and Aronson, M. (2011), Magnetic Field Tuning of Antiferromagnetic Yb<sub>3</sub>Pt<sub>4</sub>, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909090 (Accessed April 17, 2024)
Created October 10, 2011, Updated October 12, 2021