Determining themagnetic attempt time tau(0), its temperature dependence, and the grain size distribution from magnetic viscosity measurements

doi:10.1002/2015JB012283

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Determining themagnetic attempt time tau(0), its temperature dependence, and the grain size distribution from magnetic viscosity measurements
	Berndt, Thomas 1; Muxworthy, Adrian R.1; Paterson, Greig A.2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2015-11-01
卷号	120 期号:11 页码:7322-7336
DOI	10.1002/2015JB012283
文献子类	Article
英文摘要	A new method to determine the atomic attempt time.. 0 of magnetic relaxation of fine particles, which is central to rock and soil magnetism and paleomagnetic recording theory, is presented, including the determination of its temperature dependence, and simultaneously the grain size distribution of a sample. It is based on measuring a series of zero-field magnetic viscous decay curves for saturation isothermal remanent magnetization at various different temperatures that are later joined together on a single grain size scale from which the grain size distribution and attempt time are determined. The attempt time was determined for three samples containing noninteracting, single-domain titanomagnetites of different grain sizes for temperatures between 27 K and 374 K. No clear temperature-dependent trend was found; however, values varied significantly from one sample to the other: from 10(-11) to 10(-8)s; in particular, the sample containing multiple magnetic phases had an effective attempt time significantly lower than the more homogeneous samples, thereby questioning the applicability of the simple Neel-Arhennius equation for magnetic relaxation for composite materials.
WOS关键词	MICROCRYSTALS ; PARTICLES ; SYSTEMS ; NEVADA
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000368437800004
资助机构	IRM Visiting Research Fellowship by National Science Foundation ; IRM Visiting Research Fellowship by National Science Foundation ; W. M. Keck Foundation ; W. M. Keck Foundation ; University of Minnesota ; University of Minnesota ; IRM Visiting Research Fellowship by National Science Foundation ; IRM Visiting Research Fellowship by National Science Foundation ; W. M. Keck Foundation ; W. M. Keck Foundation ; University of Minnesota ; University of Minnesota
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62094]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London, England 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Berndt, Thomas,Muxworthy, Adrian R.,Paterson, Greig A.. Determining themagnetic attempt time tau(0), its temperature dependence, and the grain size distribution from magnetic viscosity measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2015,120(11):7322-7336.
APA	Berndt, Thomas,Muxworthy, Adrian R.,&Paterson, Greig A..(2015).Determining themagnetic attempt time tau(0), its temperature dependence, and the grain size distribution from magnetic viscosity measurements.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,120(11),7322-7336.
MLA	Berndt, Thomas,et al."Determining themagnetic attempt time tau(0), its temperature dependence, and the grain size distribution from magnetic viscosity measurements".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120.11(2015):7322-7336.