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RESEARCH PRODUCT
Lattice Instability and Competing Spin Structures in the Double Perovskite Insulator Sr2FeOsO6
Avijit Kumar PaulManfred ReehuisVadim KsenofontovBinghai YanAndreas HoserDaniel M. TöbbensPeter AdlerMartin JansenaClaudia Felsersubject
Condensed Matter - Materials ScienceCondensed Matter - Strongly Correlated ElectronsCondensed Matter::Materials ScienceStrongly Correlated Electrons (cond-mat.str-el)Materials Science (cond-mat.mtrl-sci)FOS: Physical sciencesCondensed Matter::Strongly Correlated Electronsdescription
The semiconductor Sr2FeOsO6, depending on temperature, adopts two types of spin structures that differ in the spin sequence of ferrimagnetic iron - osmium layers along the tetragonal c-axis. Neutron powder diffraction experiments, 57Fe M\"ossbauer spectra, and density-functional theory calculations suggest that this behavior arises because a lattice instability resulting in alternating iron-osmium distances fine-tunes the balance of competing exchange interactions. Thus, Sr2FeOsO6 is an example for a double perovskite, in which the electronic phases are controlled by the interplay of spin, orbital, and lattice degrees of freedom.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-07-09 |