Magnetic Field Tuning of Antiferromagnetic Yb3Pt4

Published

October 11, 2011

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 T_N = 2.4 K in zero field. The antiferromagnetic order was suppressed to T_N 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 T_N 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 T_N arrow}0, the antiferromagnetic transition is increasingly influenced by a quantum critical endpoint, where T_N ultimately vanishes in a first order phase transition.

Citation

Physical Review B

Volume

84

Issue

13

Pub Type

Journals

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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 Yb₃Pt₄, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909090 (Accessed October 11, 2025)