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Study of defect-induced ferromagnetism in hydrogenated anatase
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10.1063/1.3431396
/content/aip/journal/jap/107/11/10.1063/1.3431396
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/11/10.1063/1.3431396

Figures

Image of FIG. 1.
FIG. 1.

Fitted and indexed XRD pattern of recorded at 300 K. Observed (calculated) profiles are shown by open circle (solid line) curves. The short vertical marks (upper one for anatase phase and lower one for rutile phase) represent Bragg reflections. The lower curve is the difference plot.

Image of FIG. 2.
FIG. 2.

[(a) and (b)] Fitted XRD patterns of (a) as-prepared and (b) hydrogenated . The observed (open circle), calculated (solid line), the short vertical marks (upper one for anatase phase and lower one for rutile phase) represent Bragg reflections and the corresponding difference plot (solid line) are also shown for each.

Image of FIG. 3.
FIG. 3.

The , XPS spectra for pure , as-prepared , the hydrogenated and reheated .

Image of FIG. 4.
FIG. 4.

(a) The XPS spectra for pure , as-prepared and hydrogenated . (b) The XPS spectra, along with the Gaussian fits, for the as-prepared . (c) The Gaussian peaks shown for comparison of bulk content.

Image of FIG. 5.
FIG. 5.

The XPS spectra for the as-prepared and the hydrogenated along with the Gaussian fits.

Image of FIG. 6.
FIG. 6.

[(a)–(d)] The M-H curves at 300 K for (a) , (b) as-prepared , (c) hydrogenated , and (d) reheated .

Image of FIG. 7.
FIG. 7.

Comparison of M-H curves for hydrogenated at 300 and 50 K.

Image of FIG. 8.
FIG. 8.

A magnified view of the strongest Bragg reflected (101) peak for , the as-prepared , the hydrogenated , and the reheated

Tables

Generic image for table
Table I.

The refined lattice and structural parameters for pure , , and hydrogenated . Ti(Co) atoms resides at (0, 1/4, 3/8) and O atoms at (0, 1/4, z) sites in the tetragonal lattice with space group: I 41/a m d (No. 141, ).

Generic image for table
Table II.

The saturation magnetic moments , coercivity, remanence estimated from M-H curves, the resistance values for pure , Co-doped sample before and after hydrogenation and after the heat treatment. The relative oxygen bulk contents estimated from the XPS data are also shown.

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/content/aip/journal/jap/107/11/10.1063/1.3431396
2010-06-08
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Study of defect-induced ferromagnetism in hydrogenated anatase TiO2:Co
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/11/10.1063/1.3431396
10.1063/1.3431396
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