Magnetorefractive and Kerr effects in the La0.67Ca0.33MnO3/La0.67Sr0.33MnO3 (n) superlattices
Artikel i vetenskaplig tidskrift, 2014

It is demonstrated that in the [La0.67Ca0.33MnO3(d = 9 nm)/La0.67Sr0.33MnO3(9 nm)](3) and [La0.67Ca0.33MnO3(9 nm)/SrTiO3(2 nm)/La0.67Sr0.33MnO3(9 nm)](3) superlattices with the interlayer barriers of nonmagnetic dielectric SrTiO3, the magneto-optical Kerr and magnetorefraction (magnetoreflection and magnetotransmission of unpolarized light) effects have large values close to those for the heterostructures of the same composition. The defects and strain in the layers and at interfaces of superlattices result in appearance of additional band in the Kerr effect spectrum, temperature hysteresis, and abnormal temperature dependence of the Kerr effect. It is shown, that the resonant-like contribution to the magnetoreflection spectra of superlattices is due to the shift of the minima in reflection coefficient near the phonon bands by magnetic field. The increase in magnetotransmission of superlattices relative to a single layered film is due to multiple transmission of light through the layers of superlattices. The intermixing effects at interfaces and deviations of composition of layers from stoichiometry both influence the values of magnetorefraction effect in superlattices and the shapes of their temperature dependences.

Superlattices

Magnetorefractive effect

Kerr effects

Manganites

Magnetotransmission

Magnetoreflection

Interfaces phenomena

Infrared

Författare

Y. P. Sukhorukov

Russian Academy of Sciences

A. V. Telegin

Russian Academy of Sciences

A. P. Nosov

Russian Academy of Sciences

E. A. Gan'shina

Moscow State University

Evgeni Stepantsov

Russian Academy of Sciences

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Superlattices and Microstructures

0749-6036 (ISSN) 1096-3677 (eISSN)

Vol. 75 680-691

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1016/j.spmi.2014.09.005