A strong angular dependence of magnetic properties of magnetosome chains: Implications for rock magnetism and paleomagnetism
文献类型：期刊论文
| 作者 | Li, Jinhua1,2; Ge, Kunpeng1,2; Pan, Yongxin1,2; Williams, Wyn3; Liu, Qingsong4; Qin, Huafeng4 |
| 刊名 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
 |
| 出版日期 | 2013-10-01 |
| 卷号 | 14期号:10页码:3887-3907 |
| 关键词 | magnetosome chain magnetic property angular dependence magnetic anisotropy rock magnetism paleomagnetism |
| ISSN号 | 1525-2027 |
| DOI | 10.1002/ggge.20228 |
| 文献子类 | Article |
| 英文摘要 | Single-domain magnetite particles produced by magnetotactic bacteria (magnetosomes) and aligned in chains are of great interest in the biosciences and geosciences. Here, we investigated angular variation of magnetic properties of aligned Magnetospirillum magneticum AMB-1 cells, each of which contains one single fragmental chain of magnetosomes. With measurements at increasing angles from the chain direction, we observed that (i) the hysteresis loop gradually changes from nearly rectangular to a ramp-like shape (e. g., B-c and remanence decrease), (ii) the acquisition and demagnetization curves of IRM shift toward higher fields (e. g., B-cr increases), and (iii) the FORC diagram shifts toward higher coercivity fields (e. g., B-c,(FORC) increases). For low-temperature results, compared to unoriented samples, the samples containing aligned chains have a much lower remanence loss of field-cooled (delta(FC)) and zero-field-cooled (delta(ZFC)) remanence upon warming through the Verwey transition, higher delta-ratio (delta = delta(FC)/delta(ZFC)) for the measurement parallel to the chain direction, and lower delta-ratio, larger delta(FC) and delta(ZFC) values for the perpendicular measurement. Micromagnetic simulations confirm the experimental observations and reveal that the magnetization reversal of magnetosome chain appears to be noncoherent at low angles and coherent at high angles. The simulations also demonstrate that the angular dependence of magnetic properties is related to the dispersion degree of individual chains, indicating that effects of anisotropy need to be accounted for when using rock magnetism to identify magnetosomes or magnetofossils once they have been preserved in aligned chains. Additionally, this study experimentally demonstrates an empirical correspondence of the parameter B-c,(FORC) to B-cr rather than B-c, at least for magnetite chains with strong shape anisotropy. This suggests FORC analysis is a good discriminant of magnetofossils in sediments and rocks. |
| WOS关键词 | SINGLE-DOMAIN MAGNETITE ; EOCENE THERMAL MAXIMUM ; ELEMENT MESH QUALITY ; ORGANIC-CARBON FLUX ; MAGNETOTACTIC BACTERIA ; MAGNETOSPIRILLUM-GRYPHISWALDENSE ; FERROMAGNETIC-RESONANCE ; BIOGENIC MAGNETITE ; MAGNETOCRYSTALLINE ANISOTROPY ; JACOBIAN MATRIX |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000330531400001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China (NSFC)(41004024) ; National Natural Science Foundation of China (NSFC)(41004024) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; National Natural Science Foundation of China (NSFC)(41004024) ; National Natural Science Foundation of China (NSFC)(41004024) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; National Natural Science Foundation of China (NSFC)(41004024) ; National Natural Science Foundation of China (NSFC)(41004024) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; National Natural Science Foundation of China (NSFC)(41004024) ; National Natural Science Foundation of China (NSFC)(41004024) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) ; China Postdoctoral Science Foundation (CPSC)(201104144) ; China Postdoctoral Science Foundation (CPSC)(201104144) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87228]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li, Jinhua |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Paleomagnetism & Geochronol Lab, Beijing, Peoples R China 2.Chinese Acad Sci, China France Biomineralizat & Nanostruct Lab, Beijing, Peoples R China 3.Univ Edinburgh, Grant Inst Earth Sci, Edinburgh, Midlothian, Scotland 4.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jinhua,Ge, Kunpeng,Pan, Yongxin,et al. A strong angular dependence of magnetic properties of magnetosome chains: Implications for rock magnetism and paleomagnetism[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2013,14(10):3887-3907. |
| APA | Li, Jinhua,Ge, Kunpeng,Pan, Yongxin,Williams, Wyn,Liu, Qingsong,&Qin, Huafeng.(2013).A strong angular dependence of magnetic properties of magnetosome chains: Implications for rock magnetism and paleomagnetism.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,14(10),3887-3907. |
| MLA | Li, Jinhua,et al."A strong angular dependence of magnetic properties of magnetosome chains: Implications for rock magnetism and paleomagnetism".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 14.10(2013):3887-3907. |
入库方式： OAI收割
来源：地质与地球物理研究所
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