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Room temperature ferromagnetism in metallic and insulating (In1− x Fe x )2O3 thin films
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Image of FIG. 1.
FIG. 1.

(Color online) XRD patterns for (In1− x Fe x )2O3 films deposited at a of 5 × 10−3 mTorr.

Image of FIG. 2.
FIG. 2.

(Color online) Variation of the d (222) values of (In1− x Fe x )2O3 films with .

Image of FIG. 3.
FIG. 3.

(Color online) The Fe 2p XPS spectra for (In0.95Fe0.05)2O3 films deposited at different .

Image of FIG. 4.
FIG. 4.

(Color online) Variation of the RT Ms values of (In1− x Fe x )2O3 films with (a) and (b) nc . The points with round circles indicate the films are metallic.

Image of FIG. 5.
FIG. 5.

Hysteresis loops measured at 5 and 300 K for (In0.95Fe0.05)2O3 films deposited under various . (a)  = 5 × 10−3 mTorr (sample A); (b) = 100 mTorr (sample B). The insets showed the hysteresis loops on the expanded scale. The coercive fields were 205 and 145 Oe at 5 and 300 K, respectively, for sample A, and were about 170 and 110 Oe at 5 and 300 K, respectively, for sample B.

Image of FIG. 6.
FIG. 6.

The magnetization versus applied magnetic field of (In0.95Fe0.05)2O3 films grown at  = 5 × 10−3 mTorr with different thicknesses.

Image of FIG. 7.
FIG. 7.

The temperature dependence of R for (In0.95Fe0.05)2O3 films grown at  = 5 × 10−3 mTorr (sample A) and 100 mTorr (sample B). The inset shows Log R vs T−1/4 for sample B.

Image of FIG. 8.
FIG. 8.

(Color online) Dependence of α 2 (α, absorption coefficient) on photon energy for sample (a) A and (b) B as a function of temperature.

Image of FIG. 9.
FIG. 9.

(Color online) The MCD spectra taken in B = 18 kOe at room temperature for sample A (solid squares) thickness 319 nm and B (solid circles) thickness 224 nm.


Generic image for table
Table I.

RT properties of the samples studied. For high resistivity samples using “–”, meaning cannot be measured in our equipment. The (In0.95Fe0.05)2O3 films deposited under = 5×10−3 mTorr and 100 mTorr are labeled as sample A and sample B, respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Room temperature ferromagnetism in metallic and insulating (In1−xFex)2O3 thin films