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

U. Döbler, K. Baberschke, Stewart Barnes

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 - 1983

Fingerprint

Paramagnetic resonance
Exchange interactions
Single crystals
Impurities
impurities
single crystals
Electric fields
Crystals
electric fields
interactions
admixtures
Excited states
doped crystals
Linewidth
conduction electrons
Ground state
crystals
Annealing
Defects
annealing

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

8(3) resonance in ESR of (ErY)Al2 single crystals. / Döbler, U.; Baberschke, K.; Barnes, Stewart.

In: Physical Review B, Vol. 27, No. 11, 1983, p. 6593-6607.

Research output: Contribution to journalArticle

Döbler, U. ; Baberschke, K. ; Barnes, Stewart. / 8(3) resonance in ESR of (ErY)Al2 single crystals. In: Physical Review B. 1983 ; Vol. 27, No. 11. pp. 6593-6607.
@article{64bec9e6d84349dd9a4885ede1423318,
title = "8(3) resonance in ESR of (ErY)Al2 single crystals",
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.",
author = "U. D{\"o}bler and K. Baberschke and Stewart Barnes",
year = "1983",
doi = "10.1103/PhysRevB.27.6593",
language = "English (US)",
volume = "27",
pages = "6593--6607",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "11",

}

TY - JOUR

T1 - 8(3) resonance in ESR of (ErY)Al2 single crystals

AU - Döbler, U.

AU - Baberschke, K.

AU - Barnes, Stewart

PY - 1983

Y1 - 1983

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=35949018076&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35949018076&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.27.6593

DO - 10.1103/PhysRevB.27.6593

M3 - Article

AN - SCOPUS:35949018076

VL - 27

SP - 6593

EP - 6607

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 11

ER -