DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 54: Magnetic Coupling Phenomena

MA 54.4: Talk

Friday, March 20, 2015, 10:15–10:30, EB 301

Unusual ferromagnetic YMnO3 phase in YMnO3/La2/3Sr1/3MnO3 heterostructures — •Carmine Autieri and Biplab Sanyal — Department of Physics and Astronomy, Uppsala University, Box-516, SE-75120 Uppsala, Sweden

By means of ab-initio density functional calculations in the Hubbard model framework, we have studied the structural, magnetic and electronic properties of YMnO3/La2/3Sr1/3MnO3 heterostructures. Although in the bulk the ground state of YMnO3 is a ferroelectric antiferromagnet, the YMnO3/La2/3Sr1/3MnO3 heterostructure stabilizes the ferromagnetic phase in YMnO3 in the interface region. The hypothetical ferromagnetic phase of bulk YMnO3 is dielectric and due to substantial differences between the lattice constants in the ab plane, a strong magnetocrystalline anisotropy is present. This anisotropy produces a high coercivity of the unusual ferromagnetic YMnO3 that can explain the large vertical shift in the hysteresis loops observed in recent experiments. The correlation between weak exchange bias and vertical shift in hysteresis loops is proposed, which calls for reinvestigation of various systems showing vertical shifts.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin