Commensurability of higher order between vortex and crystal lattice in RBa2Cu3O7 (R=Y, Nd)

✍ Scribed by H. Küpfer; G. Ravikumar; A.A. Zhukov; P.A.J. de Groot; C. Meingast; A.I. Rykov; S. Tajima; Th. Wolf

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 303 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2003.09.101

✦ Synopsis

Commensurate states, investigated by magnetization, are observed in very pure RBa 2 Cu 3 O 7 (R ¼ Y, Nd) single crystals if the intervortex distance a c becomes equal to an integer number k of the crystal lattice constant d (a c ¼ kd). Incommensurate states at higher temperatures and fields develop, split up and become finally commensurate with k=2 or even with a smaller fraction k=n of the crystal lattice constant (na c ¼ kd). These additional states of higher order (n > 1) are related to a superstructure of the vortex lattice with respect to the crystal lattice.