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Nature of magnetism in copper-doped oxides: , , MgO, , , and ZnO
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Image of FIG. 1.
FIG. 1.

Room temperature XRD patterns for different Cu-doped oxides. The peaks marked as 1 are for bulk CuO and unmarked peaks are due to the corresponding host oxides.

Image of FIG. 2.
FIG. 2.

EMR derivative spectra for several Cu-doped oxides taken at and . Inset shows the narrow-range field scanned spectrum for at .

Image of FIG. 3.
FIG. 3.

Magnetic susceptibility vs temperature data at for different Cu-doped oxides. Solid lines are fits to the Curie-Weiss law for each sample.

Image of FIG. 4.
FIG. 4.

Magnetization vs magnetic field data at . The solid lines are fit to Brillouin function for with magnitudes of given in Table I. The inset shows the hysteresis loop data for the low-field region for some oxides. Noticeable hysteresis is observed only for .

Image of FIG. 5.
FIG. 5.

vs data of Fig. 3 are replotted to highlight the behavior at the higher temperatures.


Generic image for table
Table I.

Experimental results for the 10% Cu-doped oxides ( and are in units of and , respectively).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nature of magnetism in copper-doped oxides: ZrO2, TiO2, MgO, SiO2, Al2O3, and ZnO