Magnetic domains and magnetic stability of cohenite from the Morasko iron meteorite
Magnetic domains and magnetic stability of cohenite from the Morasko iron meteorite
复制标题
莫拉斯科铁陨石中的钴辉石的磁畴和磁稳定性
DOI:
10.1016/j.jmmm.2016.10.161
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发表时间:
--
影响因子:
2.7
通讯作者:
Jackson
中科院分区:
文献类型:
--
作者:
Reznik;Kontny;Uehara;Gattacceca;Solheid;Jackson
Magnetic properties, texture and microstructure of cohenite grains from Morasko iron meteorite have been investigated using electron backscattered diffraction, Bitter pattern technique, magneto-optical imaging method and magnetic force microscopy. Cohenite shows much stronger magnetic contrast compared to kamacite because it is magnetically harder than the Fe-Ni alloy, and thus causes higher stray fields. A surprising result is the high stability and reversibility of the global stripe-like magnetic domain structure in cohenite when applying high magnetic fields up to 1.5 T, and exposing it to high temperatures above the Curie temperature of about 220 °C. Heating up to 700 °C under atmosphere conditions has shown that cohenite remains stable and that the global magnetic domain structures mainly recover to its preheating state. This observation suggests that magnetic domains are strongly controlled by the crystal anisotropy of cohenite. Branching magnetic domain structures at the grain boundary to kamacite can be annealed, which indicates that they are very sensitive to record deformation. EBSD observations clearly demonstrate that increasing deviation from the easy [010] crystallographic axis and stress localization are the main factors controlling the distortion of Bitter patterns, and suggest a high sensitivity of the cohenite magnetic domain structure to local microstructural heterogeneities. The results of this study substantiate the theory that cohenite can be a good recorder of magnetic fields in planetary core material.
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影响因子:
1.5
作者:
V. Geist;G. Wagner;G. Nolze;O. Moretzki
通讯作者:
O. Moretzki
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
B. Moskowitz;S. Halgedahl;C. A. Lawson
通讯作者:
C. A. Lawson
影响因子:
5.3
作者:
Gattacceca, J.;Boustie, M.;Berthe, L.
通讯作者:
Berthe, L.
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
E. Santos;J. Gattacceca;P. Rochette;R. Scorzelli;G. Fillion
通讯作者:
G. Fillion
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
N. Sugiura;D. Strangway
通讯作者:
D. Strangway