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Low-Field Magnetoresistance in Manganite Thin Films

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Vlakhov E., Dörr K., Müller K., Handstein A., Nenkov K., Walter T., Chakalov R., Chakalova R., Spasov A.

Acta Physica Polonica A

2000

vol. 97

issue 5

787-790

Grain boundaries play an important role in low-field magnetoresistance of La_{0.7}Ca_{0.3}MnO_{3} and La_{0.7}Sr_{0.3}MnO_{3} thin films deposited by magnetron sputtering and pulsed laser deposition on YSZ(100) and silicon substrates buffered by YSZ. Well-pronounced low-field magnetoresistance hysteresis was observed in magnetic fields applied in in-plane and out-of-plane directions. High values of local magnetoresistance sensitivity d(MR)/dH in the vicinity of the coercive field were obtained reaching up to 0.2%/Oe for La_{0.7}Ca_{0.3}MnO_{3} samples at 5 K.

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1 Acta Physica Polonica A

1 2000

1 Chakalov R.

1 Chakalova R.

1 Dörr K.

1 Handstein A.

1 Müller K.

1 Nenkov K.

1 Spasov A.

1 Vlakhov E.

1 Walter T.

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Low-Field Magnetoresistance in Manganite Thin Films