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Title: | Vortex phases in Bi<inf>2</inf>Sr<inf>2</inf>CaCu<inf>2</inf>O <inf>8+δ</inf> single crystals in tilted magnetic fields | Authors: | Mirković J. Hayama S. Nakano A. Ivanović K. Šetrajčić J. Kadowaki K. |
Issue Date: | 1-Jan-2004 | Journal: | Materials Science Forum | Abstract: | The nature of the vortex lattice melting transition in high-quality single crystals of Bi2Sr2CaCu2O8+δ has been studied by means of both in-plane and out-of-plane resistivity measurement in Corbino geometry and local ac-magnetic response measurement by using miniature coils. The vortex matter phase diagram has been established for the whole angular range, in particular, focusing in detail on angles within a few degrees of the ab-plane. The first-order vortex melting phase transition has been clearly observed in magnetic fields tilted away from the c-axis, indicating the crossing lattice structures. However, at about ± 0.2° from the ab-plane, a distinct anomaly was found, suggesting a two-stage melting phase transition in parallel magnetic fields: the vortex-lattice → smectic → liquid phase transition, or transitions from the crossing vortex-lattice to the tilted vortex-lattice near the ab-plane. Another anomaly, in the temperature dependence of resistance in parallel magnetic fields, indicated the revival of the first-order nature of the transition very close to Tc. | URI: | https://open.uns.ac.rs/handle/123456789/11417 | ISSN: | 02555476 |
Appears in Collections: | PMF Publikacije/Publications |
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