The results of the study of the spectral and relaxation parameters of 63.65Cu nuclear magnetic resonance (NMR) in a local field in natural samples of the semiconductor mineral chalcopyrite (CuFeS2), which is characterized by a strong interplay of magnetic and electronic properties, are presented. The main attention was paid to the determination of the mechanism of nuclear spin–lattice relaxation. The well-resolved quadrupole structure of the 63.65Cu NMR spectrum allowed us to investigate the kinetics of nuclear magnetization recovery for both Cu isotopes. The magnetic mechanism of the spin–lattice relaxation of the nuclear spins of copper isotopes 63.65Cu in CuFeS2, due to fluctuations of the dipole local fields created by the electron spins of magnetic Fe3+ ions, has been determined.

中文翻译：

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局部场中的 NMR 63.65Cu 和 CuFeS2 磁性半导体中核自旋的弛豫

在半导体矿物黄铜矿 (CuFeS2) 的天然样品中的局部场中 63.65Cu 核磁共振 (NMR) 的光谱和弛豫参数的研究结果为呈现。主要关注的是确定核自旋-晶格弛豫机制。63.65Cu NMR 谱的解析良好的四极杆结构使我们能够研究两种 Cu 同位素的核磁化恢复动力学。由于磁性 Fe3+ 离子的电子自旋产生的偶极局部场的波动，CuFeS2 中铜同位素 63.65Cu 的核自旋的自旋-晶格弛豫的磁性机制已经确定。