6533b854fe1ef96bd12ae9bc
RESEARCH PRODUCT
The effect of interface roughness on exchange bias in La0.7Sr0.3MnO3 - BiFeO3 heterostructures
Gerhard JakobSimone FinizioSimone FinizioMathias KläuiMehran VafaeeHakan DenizDietrich HesseHartmut Zabelsubject
Materials sciencePhysics and Astronomy (miscellaneous)Condensed matter physicsMagnetoresistanceStrongly Correlated Electrons (cond-mat.str-el)FOS: Physical sciencesHeterojunction02 engineering and technologyCoercivity021001 nanoscience & nanotechnology01 natural sciencesMagnetizationCondensed Matter - Strongly Correlated ElectronsCondensed Matter::Materials ScienceExchange biasFerromagnetism0103 physical sciencesMultiferroicsCondensed Matter::Strongly Correlated ElectronsExponential decay010306 general physics0210 nano-technologydescription
We characterized the interfaces of heterostructures with different stack sequences of La0.7Sr0.3MnO3/BiFeO3 (LSMO/BFO) and BFO/LSMO using TEM revealing sharp and rough interfaces, respectively. Magnetometry and magnetoresistance measurements do not show a detectable exchange bias coupling for the multistack with sharp interface. Instead, the heterostructures with rough and chemically intermixed interfaces exhibit a sizable exchange bias coupling. Furthermore, we find a temperature-dependent irreversible magnetization behavior and an exponential decay of coercive and exchange bias field with temperature suggesting a possible spin-glass-like state at the interface of both stacks.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-27 |