Radio-frequency measurements of UNiX compounds (X = Al, Ga, Ge) in high magnetic fields

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:321

Article

Alsmadi, A. M.¹  Alyones, S.¹  Mielke, C. H.²  McDonald, R. D.²  Zapf, V.²  Altarawneh, M. M.²  Lacerda, A.²  Chang, S.³  Adak, S.⁴  Kothapalli, K.⁴  Nakotte, H.⁴ 

[1] Hashemite Univ, Dept Phys, Zarqa 13115, Jordan

[2] Los Alamos Natl Lab, Pulsed Field Facil, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

关键词: Uranium compounds;    Complex conductivity;    Metamagnetic transition;   

DOI  :  10.1016/j.jmmm.2009.07.022

来源: Elsevier

【 摘 要 】

We performed radio-frequency (RF) skin-depth measurements of antiferromagnetic UNiX compounds (X = Al, Ga, Ge) in magnetic fields up to 60 T and at tempeatures between 1.4 to similar to 60K. Magnetic fields are applied along different crystallographic directions and RF penetration-depth was measured using a tunnel-diode oscillator (DO) circuit. The sample is coupled to the inductive element of a TDO resonant tank circuit, and the shift in the resonant frequency Delta f of the circuit is measured. The UNiX compounds exhibit field-induced magnetic transitions at low temperatures, and those transitions are accompanied by a drastic change in Delta f. The results of our skin-depth measurements were compared with previously published B-T phase diagrams for these three compounds. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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