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 language | English (US) |
|---|---|
| Pages (from-to) | 6593-6607 |
| Number of pages | 15 |
| Journal | Physical Review B |
| Volume | 27 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1983 |
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- Condensed Matter Physics
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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 journal › Article
}
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.
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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 -