A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

The predominance of substrate induced defects in magnetic properties of Sr2FeMoO6 thin films




TekijätSaloaro M, Deniz H, Huhtinen H, Palonen H, Majumdar S, Paturi P

KustantajaIOP Publishing LTD

Julkaisuvuosi2015

JournalJournal of Physics: Condensed Matter

Tietokannassa oleva lehden nimiJOURNAL OF PHYSICS-CONDENSED MATTER

Lehden akronyymiJ Phys-Condens Mat

Artikkelin numeroARTN 386001

Vuosikerta27

Numero38

Aloitussivu1

Lopetussivu11

Sivujen määrä11

ISSN0953-8984

DOIhttps://doi.org/10.1088/0953-8984/27/38/386001


Tiivistelmä

A systematic study of epitaxially grown Sr2FeMoO6 thin films on SrTiO3, (LaAlO3)(0.3) (Sr2AlTaO6)(0.7), SrLaAlO4 and MgO single crystal substrates were made. Transmission electron microscopy investigations showed sharp substrate/films interfaces and increased defect concentration with increased lattice mismatch, indicating defect formation such as dislocations, low angle grain boundaries and stacking faults as a strain relaxation mechanism. Large enough compressive mismatch cause the over-relaxation of the lattice parameters through reorganization or interface defects, which was observed as a tensile strain in films with compressive mismatch larger than -1.05%. All the films with compressive mismatch were phase pure and epitaxially textured while signatures of SrMoO4 parasitic particle was found only in the film grown on MgO. No correlation between the antisite disorder and other structural defects or magnetic properties were found. Instead, the saturation magnetization, Curie temperature, magnetic domain rotation etc are higly dependent on the lattice mismatch induced defects, which outshines the possible correlation with B-site ordering.




Last updated on 2024-26-11 at 15:44