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- W1981764062 abstract "A pulsed-electron-spin-resonance experiment has been performed on a single crystal of lanthanum trifluoride containing 0.1 molar per cent of neodymium impurity. The purpose of the experiment was to measure the superhyperfine coupling between the magnetic moments of the ligand fluorine nuclei and the magnetic moment of the $4f$ electronic spin belonging to the neodymium ion. The experiment employed the technique of spin-echo envelope modulation. Modulation envelopes were obtained at five orientations of the laboratory magnetic field. The interaction parameters were determined by comparing the experimentally derived modulation envelopes with the computed theoretical modulation curves. Under the assumption that all of the near nuclei interact with equal strengths, it was found that the isotropic interaction parameter $A=ensuremath{-}1.5ifmmodepmelsetextpmfi{}0.5$ MHz and that the dipole-dipole or anisotropic parameter $D=4ifmmodepmelsetextpmfi{}1$ MHz. The negative value of $A$ implies that the $4f$ electronic spin in the vicinity of the ligands is parallel to the net spin of the neodymium ion. The value of $D$ that was measured is greater than what would be expected if the interaction were purely of the classical point-dipole type. Therefore, some covalent bonding involving neodymium $f$ orbitals and fluorine $p$ orbitals must be present." @default.
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- W1981764062 title "Spin-echo envelope modulation study of La<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>F</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>:<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:…" @default.
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- W1981764062 doi "https://doi.org/10.1103/physrevb.19.1" @default.
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