Conduction-electron-spin polarization near Mn impurities in Cu
- 1 April 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 9 (7), 3106-3112
- https://doi.org/10.1103/physrevb.9.3106
Abstract
The perturbation of hyperfine fields by nearby Mn impurities was measured by detecting copper satellite-nuclear-resonance lines. Three satellites were found and were attributed to the resonance of copper nuclei in second-, third-, and fourth-neighboring shells to an impurity. The hyperfine-field perturbation of first-neighbor nuclei and the envelope of the oscillating disturbance at distant neighbors can be estimated from other information. We have expressed the experimental results in a form which can be readily compared with free-electron calculations of conduction-electron-spin polarization by magnetic impurities. The Rudermann-Kittel-Kasuya-Yosida (RKKY) mechanism is apparently too weak to account for the observed polarization, and we have calculated the conduction-electron-spin disturbance which arises from hybridization of conduction states with the impurity states. Near the impurity this computed spin polarization is not particularly sensitive to details of the model. It depends primarily only on the impurity density-of-states bandwidth, and agreement with experiment is very good for a halfwidth of about 0.2 eV.
Keywords
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