Nuclear quadrupole resonance measurement of the anisotropic magnetic shielding and quadrupole coupling constants of ${}^{151}{Eu}^{3 +}$ and ${}^{153}{Eu}^{3 +}$ dilute in YAl $O_{3}$ single crystal

The nuclear quadrupole resonance spectra of

{Eu}^{3 +}

in YAl

O_{3}

single crystal at ∼ 10 K are reported. From the ratio of the quadrupole interaction parameters of

{}^{151}{Eu}

and

{}^{153}{Eu}

, the ratio of the quadrupole moments corrected for the pseudoquadrupole interaction is obtained

\frac{Q^{153}}{Q^{151}} = 2.5812 \pm 0.0010

. With low-magnetic-field studies the anisotropic magnetic shielding factors are measured. They are

α_{x} = 0.58

α_{y} = 0.80

α_{z} = 0.47

compared to an estimate of

α_{z} = 0.89

by Elliott. A measured value

〈 r^{- 3} 〉 = 39

Å^{- 3}

is obtained using Elliott's formulation and the experimental values of the anisotropic magnetic shielding factors.

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Nuclear quadrupole resonance measurement of the anisotropic magnetic shielding and quadrupole coupling constants ofEu3+151andEu3+153dilute in YAlO3single crystal