Abstract
Characteristic NMR parameters of 63,65Cu in the local magnetic field of the semiconductor mineral chalcopyrite CuFeS2 were measured in the range 26–77 K. The behavior of the 63,65Cu NMR spectral and relaxation parameters in the local field indicated that a magnetic phase transition related to antiferromagnetic ordering of Cu2+ magnetic moments did not occur at ~50 K in the studied CuFeS2 sample.
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