Antiferromagnetism and Anisotropy in the Susceptibility of YBa2Cu3Oy
Abstract
Magnetic susceptibility was measured on grain-oriented YBa2Cu3Oy (y≈6.1 to 7.0). A distinct kink was observed in the susceptibility-vs-temperature curve at 435 K for y≈6.1, when the external field was parallel to the c-axis. The kink is attributed to an antiferromagnetic transition and the magnetic susceptibility is well explained as a typical quadratic Heisenberg antiferromagnet with an exchange-interaction parameter of ∼950 cm-1 in the Cu(2) plane. The magnetic behavior changes gradually to the temperature-independent susceptibility of superconducting samples (y≈7.0) with nearly constant parameters of anisotropy.
- Publication:
-
Journal of the Physical Society of Japan
- Pub Date:
- July 1989
- DOI:
- 10.1143/JPSJ.58.2256
- Bibcode:
- 1989JPSJ...58.2256Y
- Keywords:
-
- Anisotropy;
- Antiferromagnetism;
- Copper Oxides;
- High Temperature Superconductors;
- Magnetic Permeability;
- Yttrium Oxides;
- Barium Oxides;
- Chemical Composition;
- Crystal Structure;
- Magnetic Field Configurations;
- Temperature Dependence;
- Solid-State Physics