Magneto transport properties of antiferromagnetic YBa2Cu3O6.25 single crystals

Citation
E. Cimpoiasu et al., Magneto transport properties of antiferromagnetic YBa2Cu3O6.25 single crystals, PHYSICA C, 364, 2001, pp. 399-403
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
364
Year of publication
2001
Pages
399 - 403
Database
ISI
SICI code
0921-4534(200111)364:<399:MTPOAY>2.0.ZU;2-F
Abstract
In-plane Delta rho (ab)/rho (ab) and out-of-plane Delta rho (c)/rho (c) mag netoresistivities of antiferromagnetic YBa2Cu3O6.25 single crystals were me asured in magnetic fields H applied along the ab-plane. Delta rho (ab)/rho (ab) is a superposition of two components: The first component is strongly in-plane anisotropic, changing sign from negative when H parallel toI to po sitive when H perpendicular toI. The second component is positive, quadrati c in H, and isotropic in the ab-plane. Delta rho (c)/rho (c) displays a fou rfold symmetry upon in-plane rotation of the magnetic field, with maxima al ong the easy axes of antiferromagnetic spin ordering and minima along unfav orable directions of spin orientation (45 degrees from the Cu-O-Cu bonds). (C) 2001 Elsevier Science B.V. All rights reserved.