The 15N NMR Knight Shift and Electronic Structure of SrMoO2.6N0.4 in the Pauli Paramagnetic State

✍ Scribed by Xinhua Zhao; H.A. Eick

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 212 KB
• Volume: 112
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1323

✦ Synopsis

The temperature-independent part (\left(K_{0}\right)) of the Knight shift, (K), of (\mathrm{SrMoO}{2.6} \mathrm{~N}{0.4}) in the Pauli paramagnetic state as determined from the ({ }^{15} \mathrm{~N}) NMR spectrum is (K_{0}=(2.87 \pm 0.01) \times 10^{-4}), with respect to the external solid reference, (\left({ }^{15} \mathrm{NH}{4}\right){2} \mathrm{SO}{4}). The fit of the spin-lattice relaxation time, (T{1}), to the Korringa relation confirms that nuclear spin-electron spin is the dominant relaxation mechanism. The probability density of conduction electrons, (P_{f}=) (0.066 \AA^{-3}), and the density of electron states per unit volume per unit energy for spin-up and -down electrons at the Fermi surface, (\rho^{ \pm}\left(f_{0}\right)=0.87\left(\mathrm{cV} \lambda^{3}\right)^{-1}), were deduced from the experimental results. By combining these data with the magnetic susceptibility an electronic structure model of (\mathrm{SrMoO}{2.6} \mathrm{~N}{0.4}) is proposed. 1994

Academic Press, tic.