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



Ryan L. Stillwell, I Lin NMN Liu, N. Harrison, M. Jaime, J. R. Jeffries, Nicholas Butch


In pulsed magnetic fields up to 65T and at temperatures below the Neel 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 Ttc 145K and Hc52T. At high fields for H>Hc we found a decreased magnetic moment roughly half of the moment reported in low field measurements. We propose that f-p hybridization effects and magnetoelastic interactions drive the decreased moment, lack of saturation at high fields, and the decreased phase boundary.
Physical Review B


high field


Stillwell, R. , Liu, I. , Harrison, N. , Jaime, M. , Jeffries, J. and Butch, N. (2017), Tricritical Point of the f-Electron Antiferromagnet USb<sub>2</sub> Driven by High Magnetic Fields, Physical Review B, [online], (Accessed May 26, 2024)


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Created January 11, 2017, Updated October 12, 2021