Magnetooptical response to tunnel magnetoresistance in manganite films with a variant structure

•The La0.67Ba0.33MnO3 films with a variant structure were grown by pulsed laser deposition.•Magnetooptical properties of nanostructured La0.67Ba0.33MnO3 manganite films have been studied.•The La0.67Ba0.33MnO3 films exhibits both tunnel and colossal magnetoresistance.•Clear optical response to tunnel...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2018-08, Vol.459, p.317-321
Main Authors: Telegin, A.V., Barsaume, S., Bessonova, V.A., Sukhorukov, Yu.P., Nosov, A.P., Kimel', A.V., Gan'shina, E.A., Yurasov, A.N., Lysina, E.A.
Format: Article
Language:English
Subjects:
Colossal and tunnel magnetoresistance
Colossal magnetoresistance
Crystal structure
Curie temperature
Grain boundaries
Infrared
Magnetic fields
Magnetic properties
Magnetism
Magnetoresistance
Magnetoresistivity
Magnetotransmission
Manganite films
Optical properties
Strontium titanates
Substrates
Temperature
Thin films
Tunnel magnetoresistance
Variant structure
Yttrium oxide
Zirconium dioxide
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Summary:•The La0.67Ba0.33MnO3 films with a variant structure were grown by pulsed laser deposition.•Magnetooptical properties of nanostructured La0.67Ba0.33MnO3 manganite films have been studied.•The La0.67Ba0.33MnO3 films exhibits both tunnel and colossal magnetoresistance.•Clear optical response to tunnel magnetoresistance has been revealed in the IR. The optical, magnetooptical, electrical, and magnetic properties of La0.67Ba0.33MnO3 films grown on the SrTiO3 and ZrO2(Y2O3) substrates have been studied. The temperature and magnetic field dependences of magnetotransmission of light in the La0.67Ba0.33MnO3/ZrO2(Y2O3) film with a variant structure exhibit features which can be attributed to an optical response to tunnel magnetoresistance – tunnel magnetotransmission. Unlike the optical response to colossal magnetoresistance, existing near the Curie temperature only, the tunnel magnetotransmission increases at T → 0 K, has a complex hysteresis behavior with the change of sign of the effect, and saturates in magnetic fields above 1 kOe. The observed tunnel magnetotransmission has been interpreted within the magnetorefractive effect theory developed for granular films.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2017.10.006