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Epitaxial growth and properties of (001)-oriented films
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Image of FIG. 1.
FIG. 1.

Schematic picture of the structure with Co1 in octahedral and Co2 in pyramidal sites. Oxygen vacancies are forming channels in the direction.

Image of FIG. 2.
FIG. 2.

HERDA spectrum of the film , measured at the recoil energy of .

Image of FIG. 3.
FIG. 3.

X-ray diffraction pattern in radial directions close to the points (0 0 2), (0 0 ) and (0 1) of reciprocal space. The notation used corresponds to the primitive perovskite unit cell. The scans were collected using Cu (a), (b) and Co (c) x-ray tubes. The arrows mark the and substrate peaks. Scans (a) and (b) were normalized to the intensity of the (0 0 2) substrate peak. Scans for the films , , and were multiplied by factors of 10, , and , respectively, in order to separate them in the plot.

Image of FIG. 4.
FIG. 4.

Magnetic moment of the films , , , and vs temperature and magnetic prehistory ( cooled, field cooled).

Image of FIG. 5.
FIG. 5.

Temperature dependences of dc resistance of the films , , , above room temperature. The inset shows the resistance of film in the wide temperature region of 150–380 K.


Generic image for table
Table I.

Unit cell parameters of the polycrystalline target and substrates.

Generic image for table
Table II.

Preparation conditions, unit cell parameters, and relative oxygen content of the films . The oxygen content was calculated assuming in the film . The relative error of the oxygen concentration is in our case on average based on counting statistics.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Epitaxial growth and properties of (001)-oriented TbBaCo2O6−δ films