Electron Spin Resonance Spectra of Fe^{3+} Ions in SrLaAlO_{4} and SrLaGaO_{4} High-T_{c} Substrates

• Authors: R. Jabłoński , A. Pajączkowska
• Languages of publication: EN

Abstracts

EN

New results concerning paramagnetic defects in SrLaAlO_{4} and SrLaGaO_{4} high-T_{c} substrates connected with unavoidable impurity Fe^{3+} are reported. The identification was checked by measuring the spectra in SrLaAlO_{4} crystals intentionally doped with 0.5 at.% Fe. Angular dependences of three lines were distinguished at X-band frequency in the temperature range from 4 K to 300 K. We attribute these lines to the transitions inside the doublets ±1/2, and "forbidden" doublets ±3/2, ±5/2, respectively. By diagonalization of spin-Hamiltonian, parameters |D| > 1.2 cm^{-1}, |E| ≈ 0.1 cm^{-1} and g_{x}=g_{y}=g_{z}= 1.987(13) for SrLaAlO_{4} and SrLaGaO_{4} were calculated and within the margin of error they were of the same value.

Keywords

EN

76.30.-v; 61.72.Hh

Discipline

• 61.72.Hh: Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.)
• 76.30.-v: Electron paramagnetic resonance and relaxation(see also 33.35.+r Electron resonance and relaxation in atomic and molecular physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 1
• Pages: 173-176

Dates

published

1997-07

Contributors

author

R. Jabłoński

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

A. Pajączkowska

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland
• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 00-668 Warsaw, Poland

Identifiers

DOI

10.12693/APhysPolA.92.173