Host Nuclear Magnetic Resonance in Copper‐Based Magnetic Alloys

Abstract

AbstractThe lineshape of the bulk Cu63 NMR signal of the Kondo systems _Cu—Mn, _Cu—Fe, and _Cu—Co is investigated experimentally as a function of the temperature and of the concentration of the dilute magnetic impurities. The measurements are compared with Monte‐Carlo simulated line‐shapes broadened by charge density oscillations as well as spin density oscillations of the conduction electrons in the surrounding of the impurity atoms. The increasing coupling between the impurity and the conduction electrons with decreasing temperatures (T < TK) leads to a reduction in the amplitude of charge density oscillations in the range of the coherence length. The analysis of the experimental data gives the coupling constant |Jsd| of the different Kondo systems, showing the minimum value of |Jsd| in the middle of the 3d series for _Cu—Mn.