Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

F. Voogt; T. Palstra; L. Niesen; O. Rogojanu; M. James; T. Hibma

doi:10.1103/PhysRevB.57.R8107

Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

F. Voogt, T. Palstra, L. Niesen, O. Rogojanu, M. James, T. Hibma

Research output: Contribution to journal › Article › Academic › peer-review

219 Citations (Scopus)

Abstract

We provide evidence that thin films of magnetite (Formula presented) 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.

Original language	English
Pages (from-to)	R8107-R8110
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	57
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.57.R8107
Publication status	Published - 1 Jan 1998
Externally published	Yes

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title = "Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films",

abstract = "We provide evidence that thin films of magnetite (Formula presented) 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 = "F. Voogt and T. Palstra and L. Niesen and O. Rogojanu and M. James and T. Hibma",

year = "1998",

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AU - Palstra, T.

AU - Niesen, L.

AU - Rogojanu, O.

AU - James, M.

AU - Hibma, T.

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N2 - We provide evidence that thin films of magnetite (Formula presented) 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.

AB - We provide evidence that thin films of magnetite (Formula presented) 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.

UR - https://www.scopus.com/pages/publications/0001624147

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DO - 10.1103/PhysRevB.57.R8107

M3 - Article

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 14

ER -

Superparamagnetic behavior of structural domains in epitaxial ultrathin magnetite films

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