Paramagnetic ac susceptibility at the first-order vortex-lattice phase transition
- 1 August 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 54 (6), R3784-R3787
- https://doi.org/10.1103/physrevb.54.r3784
Abstract
A sharp paramagnetic peak in the local ac susceptibility at the first-order vortex-lattice phase transition in Ca crystals is found. Observation of this peak establishes the thermodynamic nature of the transition and allows accurate evaluation of the equilibrium magnetization step height. The associated estimated entropy change reaches values in excess of per pancake vortex close to . The local shows two independent dissipation peaks. The broader one is caused by the onset of irreversible magnetization, whereas the narrow one is due to hysteresis at the phase transition.
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