کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6447593 | 1641517 | 2013 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pressure demagnetization of synthetic Al substituted hematite and its implications for planetary studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Magnetic minerals can undergo high pressures during their formation and subsequent evolution, which can modify both their intrinsic magnetic properties and remanent magnetization. Aluminum-substituted hematite (Al-hematite) occurs in significant proportion in many soils and sediments, especially in temperate and warm areas. In this work we investigated the effect of high hydrostatic pressures on the magnetic remanence of two series of synthetic Al-hematites. A pressure of 1.44Â GPa resulted in 50% reduction of the isothermal remanent magnetization (IRM), which was more effective than alternating field (AF) demagnetization with the largest peak field of 120Â mT. In addition, repeated application of the same pressure leads to further demagnetization. Aluminum substitution may increase the resistance to the pressure effect by decreasing particle size and generating defects in magnetic lattices, which results in an increase in coercivity. Our study contributes to understanding the effects of pressure on rocks from the interior of Earth and other planets as well as shocked planetary surfaces, which is significant for future planetary studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Earth and Planetary Interiors - Volume 224, November 2013, Pages 1-10
Journal: Physics of the Earth and Planetary Interiors - Volume 224, November 2013, Pages 1-10
نویسندگان
Zhaoxia Jiang, Pierre Rochette, Qingsong Liu, Jérôme Gattacceca, Yongjae Yu, Vidal Barrón, José Torrent,