8(3) resonance in ESR of (ErY)Al2 single crystals

U. Döbler, K. Baberschke, S. E. Barnes

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Angle-dependent ESR results are given for 500-, 2500-, and 5000-ppm Er-doped YAl2 single crystals. An almost perfect analysis of the X- and Q-band data is achieved if the admixture of the first excited state 8(2) into the ground state 8(3) via the Zeeman interaction is taken into consideration. This enables us to determine the crystal electric field (CEF) parameter x=-0.322(20) and W=-0.29(2) K. The g-value shift yields N(EF)Jg=+0.09(5) and the thermal broadening of the linewidth |N(EF)JH|=0.059(5). The precision of the experimental data allows, in principle, the determination of a hypothetical anisotropic exchange interaction. However, the fit yields an almost isotropic exchange interaction and upper limits for |N(EF)J4|5×10-5 and |N(EF)J6|6×10-8. This will be discussed in view of other results, i.e., DyPd. The effect of annealing of local defects on the CEF is discussed. In addition we observe and analyze for the first time the so-called cluster line in a 8 resonance and for high Er concentration. Briefly, we will present similar results on (ErSc)Al2 single crystals. In addition, we present a detailed theoretical calculation for impurity conduction-electron and impurity-impurity relaxation for 8 resonances.

Original languageEnglish (US)
Pages (from-to)6593-6607
Number of pages15
JournalPhysical Review B
Volume27
Issue number11
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Dive into the research topics of '8(3) resonance in ESR of (ErY)Al2 single crystals'. Together they form a unique fingerprint.

  • Cite this