Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1708344114 |
Stability of equidimensional pseudo-single-domain magnetite over billion-year timescales | |
Nagy, Lesleis1; Williams, Wyn1; Muxworthy, Adrian R.2; Fabian, Karl3; Almeida, Trevor P.4; Conbhui, Padraig O.1; Shcherbakov, Valera P.5,6 | |
2017-09-26 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:39页码:10356-10360 |
文章类型 | Article |
语种 | 英语 |
国家 | Scotland; England; Norway; Russia |
英文摘要 | Interpretations of paleomagnetic observations assume that naturally occurring magnetic particles can retain their primary magnetic recording over billions of years. The ability to retain a magnetic recording is inferred from laboratory measurements, where heating causes demagnetization on the order of seconds. The theoretical basis for this inference comes from previous models that assume only the existence of small, uniformly magnetized particles, whereas the carriers of paleomagnetic signals in rocks are usually larger, nonuniformly magnetized particles, for which there is no empirically complete, thermally activated model. This study has developed a thermally activated numerical micromagnetic model that can quantitatively determine the energy barriers between stable states in nonuniform magnetic particles on geological timescales. We examine in detail the thermal stability characteristics of equidimensional cuboctahedral magnetite and find that, contrary to previously published theories, such nonuniformly magnetized particles provide greater magnetic stability than their uniformly magnetized counterparts. Hence, nonuniformly magnetized grains, which are commonly the main remanence carrier in meteorites and rocks, can record and retain highfidelity magnetic recordings over billions of years. |
英文关键词 | micromagnetics paleomagnetism geomagnetism thermoremanence thermal stability |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411704000038 |
WOS关键词 | THERMOREMANENT MAGNETIZATION ; PARTICLES ; CONSTANT ; SIZES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204790 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Edinburgh, Sch Geosci, Earth & Planetary Sci, Edinburgh EH9 3FE, Midlothian, Scotland; 2.Imperial Coll London, Royal Sch Mines, Dept Earth Sci & Engn, London SW7 2AZ, England; 3.Norges Geol Undersokelse, Marine Geol, N-7040 Trondheim, Norway; 4.Univ Glasgow, Sch Phys & Astron, Mat & Condensed Matter Phys, Glasgow G12 8QQ, Lanark, Scotland; 5.Russian Acad Sci, Geophys Observ, Borok 152742, Yaroslvaskaya O, Russia; 6.Kazan Fed Univ, Inst Geol & Petr Technol, Kazan 420008, Russia |
推荐引用方式 GB/T 7714 | Nagy, Lesleis,Williams, Wyn,Muxworthy, Adrian R.,et al. Stability of equidimensional pseudo-single-domain magnetite over billion-year timescales[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(39):10356-10360. |
APA | Nagy, Lesleis.,Williams, Wyn.,Muxworthy, Adrian R..,Fabian, Karl.,Almeida, Trevor P..,...&Shcherbakov, Valera P..(2017).Stability of equidimensional pseudo-single-domain magnetite over billion-year timescales.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(39),10356-10360. |
MLA | Nagy, Lesleis,et al."Stability of equidimensional pseudo-single-domain magnetite over billion-year timescales".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.39(2017):10356-10360. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论