Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

by: FC Voogt, TTM Palstra, L Niesen, OC Rogojanu, MA James, T Hibma

Physical Review B, Vol. 57, No. 14. (1 April 1998), R8107.

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Abstract

We provide evidence that thin films of magnetite Fe 3 O 4 epitaxially grown on single-crystalline MgO(100); form domains with unique magnetic properties. Strong 180° Fe-O-Fe superexchange paths at antiphase domain boundaries result in a frustration of the interdomain interactions. Probe-layer Mössbauer spectroscopy shows superparamagnetic behavior in the entire film; in spite of the nearly perfect layer-by-layer growth. Superconducting quantum interference device magnetometry is used to determine the temperature and thickness dependence of the superparamagnetic blocking temperatures.

@article{voogt, abstract = {We provide evidence that thin films of magnetite Fe 3 O 4 epitaxially grown on single-crystalline MgO(100); form domains with unique magnetic properties. Strong 180° Fe-O-Fe superexchange paths at antiphase domain boundaries result in a frustration of the interdomain interactions. Probe-layer M\"{o}ssbauer spectroscopy shows superparamagnetic behavior in the entire film; in spite of the nearly perfect layer-by-layer growth. Superconducting quantum interference device magnetometry is used to determine the temperature and thickness dependence of the superparamagnetic blocking temperatures.}, author = {Voogt, F. C. and Palstra, T. T. M. and Niesen, L. and Rogojanu, O. C. and James, M. A. and Hibma, T. }, citeulike-article-id = {2382285}, doi = {http://dx.doi.org/10.1103/PhysRevB.57.R8107}, journal = {Physical Review B}, month = {April}, number = {14}, pages = {R8107+}, posted-at = {2008-02-14 18:51:11}, priority = {2}, publisher = {American Physical Society}, title = {Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films}, url = {http://dx.doi.org/10.1103/PhysRevB.57.R8107}, volume = {57}, year = {1998} }

RIS record

TY - JOUR ID - voogt L3 - citeulike-article-id:2382285 TI - Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films JF - Physical Review B VL - 57 IS - 14 SP - R8107 PB - American Physical Society N2 - We provide evidence that thin films of magnetite Fe 3 O 4 epitaxially grown on single-crystalline MgO(100); form domains with unique magnetic properties. Strong 180° Fe-O-Fe superexchange paths at antiphase domain boundaries result in a frustration of the interdomain interactions. Probe-layer Mössbauer spectroscopy shows superparamagnetic behavior in the entire film; in spite of the nearly perfect layer-by-layer growth. Superconducting quantum interference device magnetometry is used to determine the temperature and thickness dependence of the superparamagnetic blocking temperatures. AU - Voogt, FC AU - Palstra, TTM AU - Niesen, L AU - Rogojanu, OC AU - James, MA AU - Hibma, T PY - 1998/04/01/ UR - http://dx.doi.org/10.1103/PhysRevB.57.R8107 ER -

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