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arXiv · 1609.09845

The Tricritical Point of the f-electron Antiferromagnet USb2 Driven by High Magnetic Fields

Ryan L. Stillwell·I-Lin Liu·Neil Harrison·Marcelo Jaime·Jason R. Jeffries·Nicholas P. Butch
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Abstract

In pulsed magnetic fields up to 65T and at temperatures below the N\'eel transition, our magnetization and magnetostriction measurements reveal a field-induced metamagnetic-like transition that is suggestive of an antiferromagnetic to polarized paramagnetic or ferrimagnetic ordering. Our data also suggests a change in the nature of this metamagnetic-like transition from second- to first-order-like near a tricritical point at T_{tc} ~145K and H_{c}~52T. At high fields for H>H_{c} we found a decreased magnetic moment roughly half of the moment reported in low field measurements. We propose that \mathit{f-p} hybridization effects and magnetoelastic interactions drive the decreased moment, lack of saturation at high fields, and the decreased phase boundary.

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Ryan L. Stillwell, I-Lin Liu, Neil Harrison, Marcelo Jaime, Jason R. Jeffries, Nicholas P. Butch. 2016-09-30. The Tricritical Point of the f-electron Antiferromagnet USb2 Driven by High Magnetic Fields. https://doi.org/10.1103/physrevb.95.014414

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