Artículos de revistas
Superconducting Diamagnetic Fluctuations For H ∥ Ab Planes In Yba2cu3o7-δ For Fields Up To 5 T
Registro en:
Solid State Communications. , v. 90, n. 10, p. 647 - 650, 1994.
381098
10.1016/0038-1098(94)90539-8
2-s2.0-0028447712
Autor
Salem-Sugui Jr. S.
da Silva E.Z.
Institución
Resumen
Magnetic measurements for a twin-aligned single crystal of YBa2Cu3O7δ were performed from 80 K to 200 K for fixed applied fields (H) up to 5T, parallel to the ab planes of the crystal. Magnetic fields, from 0.05 T to 1 T, produced isofield M vs T curves which exhibit sharp transitions that unambiguously identify Tc. Above H = 2 T, a field-enhanced rounding starts to appear in the isofield M vs T curves. This rounding effect in the vicinity of Tc is interpreted as due to high field-induced fluctuations in the 3D order parameter. By using an appropriate scaling, the ΔT fluctuation regions for H = 2, 3T are obtained. © 1994. 90 10 647 650 Tesanovic, Xing, Bulaevskii, Li, Suenaga, Critical fluctuations in the thermodynamics of quasi-two-dimensional type-II supeconductors (1992) Physical Review Letters, 69, p. 3563 Ullah, Dorsey, (1990) Phys. Rev. Lett., 65, p. 2066 Effect of fluctuations on the transport properties of type-II superconductors in a magnetic field (1991) Physical Review B, 44, p. 262 Lee, Klemm, Johnston, (1989) Phys. Rev. Lett., 63, p. 1012 Ikeda, Ohmi, Tsuneto, (1989) J. Phys. Soc. Jpn., 58, p. 1377 (1990) J. Phys. Soc. Jpn., 59, p. 1397 Bergman, Superconducting fluctuations in a magnetic field (1969) Zeitschrift f�r Physik, 225, p. 430 Lee, Shenoy, (1972) Phys. Rev. Lett., 28, p. 1025 Thouless, (1975) Phys. Rev. Lett., 34, p. 946 Farrell, Rice, Ginsberg, Liu, (1990) Phys. Rev. Lett., 64, p. 1573 Jia, Liu, Lan, Klavins, Shelton, Radousky, (1992) Phys. Rev. B, 45, p. 10609 Welp, Flesher, Kwok, Klemm, Vinokur, Downey, Veal, Crabtree, (1991) Phys. Rev. Lett., 67, p. 3180 Indehees, Salamon, Rice, Ginsberg, Heat capacity of untwinned YBa_{2}Cu_{3}O_{7-δ} crystals along the H_{c2} line (1991) Physical Review Letters, 66, p. 232 Campbell, Doria, Kogan, (1988) Phys. Rev. B, 38, p. 2439 Welp, Kwok, Cractree, Vandervoort, Liu, (1989) Phys. Rev. Lett., 62, p. 1908 Pureur, Menegotto Costa, Rodrigues, Jr., Schaf, Kunzler, (1993) Phys. Rev. B, 47, p. 11420