【作者】 赵新华； H·A·Eick；

【Author】 XINHUA ZHAO H.A.EICK Department of Chemistry Center for Fundamental Materials Research Michigan State University East Lansing,MI 48824-1322 On leave from The Department of Chemistry,Beijing Normal University,Beijing 100875,P.R.China.

【机构】 北京师范大学化学系； 密执安州立大学化学系和基础材料研究中心；

【摘要】 本文测定了金属性的化合物SrMoO_2.6¹⁵N_0.4在泡利顺磁状态下的¹⁵N-核磁共振吸收波谱,与固态的(¹⁵NH₄)₂So₄中¹⁵N-核磁共振吸收峰位置相比,在SrMoO_2.6N_0.4中,¹⁵N-核磁共振吸收峰发生了Knight位移[1](K₀=2.87×10^-4)。在173K～373K温度区间,自旋-晶格弛豫时间（T₁）符合Korringa关系式[2].实验结果表明,在此化合物中,¹⁵N的核磁共振弛豫主要是核自旋-电子自旋弛豫机理。在温量温度区间,K₀与温度无关.计算结果表明,此化合物费米表面导带电子的几率密度P_t=0.066A^3-1.结合磁化率测定结果[3],文中初步提出了这个化合物的电子结构模型。更多还原

【Abstract】 The temperature independent part（K₀）of the Knight shift（K）was determined from the ¹⁵N-NMR spec- trum of SrMoO_2.6N_0.4,in the Pauli paramagnetic state;K₀=2.87±1×10^-4with respect to the external solid state reference,(¹⁵NH₄)₂SO₄.The spin-lattice relaxation time（T₁）is in agreement with Korringa relation veri- fying that nuclear spin-electron spin as the dominat relaxation mechanism.The probability density of conduc- tion electrons(P₁=0.066^-3)at the Fermi surface and the density of electron states per unit volume per unit energy for spin up and down,(ρ^±（ε₀）=0.87（eV³）^-1),respectively,at the Fermi surface were deduced from the experimental results.By combining this with the magnetic susceptibility an electronic structure model of the title compound can be proposed.更多还原