Pinning, anisotropy, and the hall effect in superconductors

✍ Scribed by C.J. Lobb; T.p. Clinton; A.p. Smith; pu Liu; pi Li; J.L. Peng; R.L. Greene; M. Eddp; C.C. Tsuei

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 634 KB
• Volume: 2
• Category: Article
• ISSN: 0964-1807
• DOI: 10.1016/0964-1807(94)90059-0

✦ Synopsis

We have studied the Hall effect in the mixed state of amorphous Mo$i, an isotropic low-T, superconductor, and the high-l; superconductors T12Ba2CaCu20s (Tl22 12), Nd, ,ssCeo.l &u04 (NCCO), and YBa&&07 (YBCO), which have differing amounts of anisotropy. All of these superconductors display a sign reversal below T,. In Mo$i we reduce the effective pinning with high current and find the Hall angle increases, yet the Hall conductivity cXy is unchanged. We also demonstrate the pinning independence of the Hall conductivity and its consequent scaling in terms of the anisotropy of T12212, NCCO, and YBCO. For all of these materials there is a vortex contribution G N l/B at low fields, while at high fields cry N B.