Nuclear-Magnetic-Resonance Measurements in the Rare-Earth Group-VAIntermetallic Compounds

摘要: The temperature dependences, signs, and magnitudes of the phosphorus, arsenic, antimony, bismuth nuclear-magnetic-resonance (NMR) Knight shifts in NaCl-type rare-earth group-$\mathrm{V}A$ intermetallic compounds have been studied detail for range 1.5-600\ifmmode^\circ\else\textdegree\fi{}K. nonmagnetic compounds, such as LaP, were found to be temperature-independent. For most magnetic GdP, temperature-dependent part shift was obey a Curie-Weiss law. However, praseodymium, samarium, thulium effect sixfold cubic crystal-field interaction on ion could not neglected. An analysis, showing relationship between $4f$ paramagnetic susceptibility ${\ensuremath{\chi}}_{f}(T)$, is presented. In this manner, it shown that detailed information about ${\ensuremath{\chi}}_{f}(T)$ can derived from an analysis NMR data. Furthermore, hyperfine field at site these arises spin component S total angular momentum J ion, magnetization site. $s\ensuremath{-}f$ exchange energies $\ensuremath{\Gamma}$ calculated using uniform conduction-electron spin-polarization model shift. Group-$\mathrm{V}A$ negative (antiferromagnetic) relatively constant (\ensuremath{\simeq} -0.3 eV) all compounds. Comparisons are made various which measurements available. It again magnitude. per unit $S$ order -50 kOe. No explanation phenomenon advanced. consistent Knight-shift data terms Ruderman-Kittel-Kasuya-Yosida theory probably impossible. linewidths $\ensuremath{\delta}H$ agreement with dipolar contribution, while linewidth due presence demagnetization fields arising nonspherical shape particles powdered samples.