Upper critical field of Ti and alpha-TiAl alloys: Evidence of an intrinsictype-II superconductivity in pure Ti

Authors
Liu, SM Zhang, DL Jing, XN Lu, L Li, SL Kang, N Wu, XS Lin, JJ
Citation
Sm. Liu et al., Upper critical field of Ti and alpha-TiAl alloys: Evidence of an intrinsictype-II superconductivity in pure Ti, PHYS REV B, 62(13), 2000, pp. 8695-8698
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
13
Year of publication
2000
Pages
8695 - 8698
Database
ISI
SICI code
0163-1829(20001001)62:13<8695:UCFOTA>2.0.ZU;2-5
Abstract
The upper critical field H-c2 of alpha-Ti1-xAlx(0 less than or equal to x l ess than or equal to 0.1) alloys has been investigated in detail. The behav iors can well be described by the theory of type-II superconductors. The el ectronic specific heat deduced from the superconducting properties is in ex cellent agreement with previous calorimetric measurements. However, the Fer mi velocity obtained here is substantially lower than predicted by band cal culation. The present work gives clear evidence that pure Ti is an intrinsi c type-II superconducting element due to its very low renormalized Fermi ve locity.