Crystal-field effects in the electron-spin resonance of Gd3+ and Er3+ in Pr2CuO4
Creators
- 1. San Diego State University, San Diego, California 92182 (USA)
- 2. Centro Atomico Bariloche, 8400 Barioloche, Rio Negro, Argentina (Argentina)
- 3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
- 4. University of California, San Diego, La Jolla, California 92093-0319 (USA)
Description
The low-temperature (T<300 K) electron-spin-resonance (ESR) spectra of Gd3+ and Er3+ in Pr2CuO4 show symmetry properties appropriate to the crystal tetragonal symmetry. The completely resolved Gd3+ spectra allowed us to measure, at T=2 K, the principal g values g=1.985(8), gperpendicular=2.040(8), and the crystal-field parameters [b20=-399(2)x10-4 cm-1, b40=-33.1(7)x10-4 cm-1, and b44=205(3)x10-4 cm-1]. The large broadening of the ESR lines, observed above T∼40 K, is due to a relaxation via the thermally populated crystal-field excited Pr levels. For Er3+ in Pr2CuO4 we observe a single ESR line corresponding to a ground-state doublet with g=17.94(5) and gperpendicular≤0.2. The absence of any splittings of the ESR lines below the Neel temperature implies that the magnetostatic dipole field at the rare-earth-ion site due to the antiferromagnetically ordered Cu moments is <45 Oe
Additional details
Publishing Information
- Journal Title
- Physical Review, B: Condensed Matter
- Journal Volume
- 44
- Journal Issue
- 2
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 826-829
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22080074
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANTIFERROMAGNETISM; CRYSTAL FIELD; CUPRATES; ELECTRON SPIN RESONANCE; ERBIUM IONS; GADOLINIUM IONS; HIGH-TC SUPERCONDUCTORS; PRASEODYMIUM COMPOUNDS; SYMMETRY; TETRAGONAL LATTICES; TRANSITION TEMPERATURE
- Descriptors DEC
- CHARGED PARTICLES; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; IONS; MAGNETIC RESONANCE; MAGNETISM; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; RESONANCE; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS