H-T phase diagram of the metamagnetic transition in $URu_2Si_2$, measured in high d. c. magnetic fields

Details H-T phase diagram of the metamagnetic transition in $URu_2Si_2$, measured in high d. c. magnetic fields H-T phase diagram of the metamagnetic transition in $URu_2Si_2$, measured in high d. c. magnetic fields

2002-12-06

arxiv.org/abs/cond-mat/0212158v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures

Scientific paper

We have studied the ultrasonic velocity and ac susceptibility of $URu_2Si_2$ in d. c. magnetic fields up to 45T. A significant difference between the constructed H-T phase diagram and that extracted from earlier pulsed fields measurements can be explained in terms of a large magnetocaloric effect. A hysteresis of metamagnetic transition at low temperatures and a new phase separation line have been observed for the first time.

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