Published December 1, 1989
| Version v1
Journal article
Antiferromagnetic ordering in superconducting and oxygen-deficient nonsuperconducting RBa2Cu3O7-δ compounds (R=Nd and Sm)
- 1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California-San Diego, La Jolla, California 92093 (USA)
- 2. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)
- 3. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742
Description
Low-temperature (0.5--4 K) specific-heat measurements have been made on oxygen-deficient (δ∼0.5) nonsuperconducting RBa2Cu3O7-δ (R=Nd and Sm) compounds and compared to measurements previously performed on their high-critical-temperature Tc∼92 K superconducting counterparts (δ∼0.1). We show that the specific-heat anomaly due to magnetic ordering of the Nd3+ and Sm3+ ions in the Tc∼92 K superconducting RBa2Cu3O7-δ (R=Nd and Sm) compounds can be well described by a two-dimensional anisotropic antiferromagnetic Ising model with exchange-interaction parameters E1 and E2 in the a-b plane; the respective values of the Neel temperature TN and the ratio E1/E2 are 0.5 K and 50 for Nd and 0.61 K and 11 for Sm
Additional details
Publishing Information
- Journal Title
- Physical Review, B: Condensed Matter
- Journal Volume
- 40
- Journal Issue
- 16
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 10963-10972
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21035258
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANTIFERROMAGNETISM; BARIUM OXIDES; COPPER OXIDES; EXPERIMENTAL DATA; NEODYMIUM OXIDES; ORDER PARAMETERS; SAMARIUM OXIDES; SPECIFIC HEAT; SUBSTOICHIOMETRY; SUPERCONDUCTIVITY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; DATA; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INFORMATION; MAGNETISM; NEODYMIUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS