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- W350039974 abstract "$^{55}mathrm{Mn}$, $^{125}mathrm{Te}$, and $^{113}mathrm{Cd}$ NMR has been used in the diluted magnetic semiconductor ${mathrm{Cd}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Mn}}_{mathit{x}}$Te (x=0.01--0.6) for probing into local electronic structure. The detection of $^{55}mathrm{Mn}$ nuclei in the magnetically (3${mathit{d}}^{5}$) and quadrupolar (I=5/2) broadened NMR spectra has been possible only at low frequencies because of the ${mathrm{Mn}}^{2+}$-${mathrm{Mn}}^{2+}$ exchange interaction, particularly in the antiferromagnetic clusters for high values of x (0.125--0.6). $^{125}mathrm{Te}$, which undergoes transferred hyperfine interaction from ${mathrm{Mn}}^{2+}$, could however be detected at high frequencies (94.88 MHz) for x=0.6 and 0.3. At these high x values, exchange within the clusters reduces the effective magnetic moment 〈${mathit{S}}_{mathit{z}}$〉 experienced by Te and consequently the broadening is within limits. The situation is quite different in $^{113}mathrm{Cd}$, as ${mathrm{Mn}}^{2+}$ is not the nearest neighbor nor is it bonded to Mn directly. However, it does undergo dipolar interaction with the ${mathrm{Mn}}^{2+}$ spin and is also affected by the spin polarization of the sp band of CdTe by ${mathrm{Mn}}^{2+}$. Thus $^{113}mathrm{Cd}$ NMR has been detected for all x values. The shift changes sign between x=0.6 and x=0.3 in both Mn and Te, from positive to negative in Mn and negative to positive in Te as expected for direct versus transferred hyperfine interaction. The shift also changes sign in $^{113}mathrm{Cd}$; as expected it parallels the Mn shift." @default.
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- W350039974 date "1991-09-01" @default.
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- W350039974 title "Mn55,Te125, andCd113NMR studies of the diluted magnetic semiconductorCd1−xMnxTe in the rangex=0.01–0.6" @default.
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- W350039974 doi "https://doi.org/10.1103/physrevb.44.5343" @default.
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