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Knight Shift Studies of Transition Metals: Rhodium and Rhodium Intermetallic Compounds

Physical Review1965Vol. 138(1A), pp. A148–A152

Citations Over TimeTop 10% of 1965 papers

J.A. Seitchik, V. Jaccarino, J. H. Wernick

Abstract

The temperature dependence of the nuclear magnetic resonance (nmr) of ${\mathrm{Rh}}^{103}$ in rhodium metal has been examined. From the linearity of the Knight shift ($K$) versus susceptibility ($\ensuremath{\chi}$) plot, it is deduced that all of the temperature variation in $\ensuremath{\chi}$ is of $d$-spin origin; the slope of the $K$-versus-$\ensuremath{\chi}$ curve yields a core-polarization hyperfine field of -0.323\ifmmode\times\else\texttimes\fi{}${10}^{6}$ Oe spin. An analysis of the separate contributions to the $K$ and $\ensuremath{\chi}$ based on a two-band model is given, and some considerations offered on the exchange enhancement of $\ensuremath{\chi}$ in the Rh-Pd alloy system. Nmr has also been observed and the Knight shifts determined in the intermetallic compounds Rh${\mathrm{Sn}}_{2}$, La${\mathrm{Rh}}_{2}$, RhSi, Th${\mathrm{Rh}}_{3}$, and U${\mathrm{Rh}}_{3}$. A value of the ${\mathrm{Rh}}^{103}$ nuclear moment ${\ensuremath{\mu}}^{103}=\ensuremath{-}0.0879\ifmmode\pm\else\textpm\fi{}0.0001{\ensuremath{\mu}}_{n}$ (uncorrected for diamagnetic shielding) is obtained.

Citations Over TimeTop 10% of 1965 papers

Abstract

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