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000201629 1001_ $$0P:(DE-HGF)0$$aKasama, Takeshi$$b0
000201629 245__ $$aFerrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition. Part I: electron holography and Lorentz microscopy
000201629 260__ $$aLondon [u.a.]$$bTaylor & Francis$$c2013
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000201629 520__ $$aThe crystallographic and magnetic microstructure of magnetite (Fe3O4) below the Verwey transition (∼120 K) is studied using transmission electron microscopy. The low temperature phase is found to have a monoclinic C-centered lattice with a c-glide plane perpendicular to the b-axis, which allows twin-related crystal orientations to be distinguished. Off-axis electron holography and Lorentz electron microscopy are used to show that magnetic domains present at room temperature become subdivided into sub-micron-sized magnetic domains below the Verwey transition, with the magnetization direction in each magnetic domain oriented along the monoclinic [001] axis. The nature of the interactions between the magnetic domain walls and the ferroelastic twin walls is investigated. Cooling and warming cycles through the transition temperature are used to show that a memory effect is likely to exist between the magnetic states that form above and below the transition. Our results suggest that ferroelastic twin walls have a strong influence on the low temperature magnetic properties of magnetite.
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000201629 7001_ $$0P:(DE-HGF)0$$aHarrison, Richard J.$$b1
000201629 7001_ $$0P:(DE-HGF)0$$aChurch, Nathan S.$$b2
000201629 7001_ $$0P:(DE-HGF)0$$aNagao, Masahiro$$b3
000201629 7001_ $$0P:(DE-HGF)0$$aFeinberg, Joshua M.$$b4
000201629 7001_ $$0P:(DE-Juel1)144121$$aDunin-Borkowski, Rafal$$b5$$ufzj
000201629 773__ $$0PERI:(DE-600)2022931-8$$a10.1080/01411594.2012.695373$$gVol. 86, no. 1, p. 67 - 87$$n1$$p67 - 87$$tPhase transitions$$v86$$x1029-0338$$y2013
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