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Ordered ferrimagnetic form of ferrihydrite reveals links among structure, composition, and magnetism

文献类型：期刊论文

作者Michel, F. Marc1,2; Barron, Vidal3; Torrent, Jose3; Morales, Maria P.4; Serna, Carlos J.4; Boily, Jean-Francois5; Liu, Qingsong6; Ambrosini, Andrea7; Cismasu, A. Cristina1; Brown, Gordon E., Jr.1,2
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2010-02-16
卷号107期号:7页码:2787-2792
ISSN号0027-8424
关键词crystal structure disorder nano-sized ferrimagnets soil formation strain
DOI10.1073/pnas.0910170107
文献子类Article
英文摘要The natural nanomineral ferrihydrite is an important component of many environmental and soil systems and has been implicated as the inorganic core of ferritin in biological systems. Knowledge of its basic structure, composition, and extent of structural disorder is essential for understanding its reactivity, stability, and magnetic behavior, as well as changes in these properties during aging. Here we investigate compositional, structural, and magnetic changes that occur upon aging of "2-line" ferrihydrite in the presence of adsorbed citrate at elevated temperature. Whereas aging under these conditions ultimately results in the formation of hematite, analysis of the atomic pair distribution function and complementary physicochemical and magnetic data indicate formation of an intermediate ferrihydrite phase of larger particle size with few defects, more structural relaxation and electron spin ordering, and pronounced ferrimagnetism relative to its disordered ferrihydrite precursor. Our results represent an important conceptual advance in understanding the nature of structural disorder in ferrihydrite and its relation to the magnetic structure and also serve to validate a controversial, recently proposed structural model for this phase. In addition, the pathway we identify for forming ferrimagnetic ferrihydrite potentially explains the magnetic enhancement that typically precedes formation of hematite in aerobic soil and weathering environments. Such magnetic enhancement has been attributed to the formation of poorly understood, nano-sized ferrimagnets from a ferrihydrite precursor. Whereas elevated temperatures drive the transformation on timescales feasible for laboratory studies, our results also suggest that ferrimagnetic ferrihydrite could form naturally at ambient temperature given sufficient time.
WOS关键词X-RAY-DIFFRACTION ; NANOCRYSTALLINE MATERIAL ; CHINESE LOESS ; IRON-OXIDES ; NANOPARTICLES ; FERRITIN ; SUSCEPTIBILITY ; ENHANCEMENT ; BRAIN ; CRYSTALLIZATION
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATL ACAD SCIENCES
WOS记录号WOS:000274599500017
资助机构National Science Foundation(CHE-0431425 ; National Science Foundation(CHE-0431425 ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; Spain's Ministry of Science and Innovation ; Spain's Ministry of Science and Innovation ; European Regional Development(MAT2008-01489 ; European Regional Development(MAT2008-01489 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Nature Science Foundation of China(40821091) ; National Nature Science Foundation of China(40821091) ; EF-0830093) ; EF-0830093) ; AGL2006-C03-02) ; AGL2006-C03-02) ; National Science Foundation(CHE-0431425 ; National Science Foundation(CHE-0431425 ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; Spain's Ministry of Science and Innovation ; Spain's Ministry of Science and Innovation ; European Regional Development(MAT2008-01489 ; European Regional Development(MAT2008-01489 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Nature Science Foundation of China(40821091) ; National Nature Science Foundation of China(40821091) ; EF-0830093) ; EF-0830093) ; AGL2006-C03-02) ; AGL2006-C03-02) ; National Science Foundation(CHE-0431425 ; National Science Foundation(CHE-0431425 ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; Spain's Ministry of Science and Innovation ; Spain's Ministry of Science and Innovation ; European Regional Development(MAT2008-01489 ; European Regional Development(MAT2008-01489 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Nature Science Foundation of China(40821091) ; National Nature Science Foundation of China(40821091) ; EF-0830093) ; EF-0830093) ; AGL2006-C03-02) ; AGL2006-C03-02) ; National Science Foundation(CHE-0431425 ; National Science Foundation(CHE-0431425 ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; U.S. Department of Energy (DOE)(DE-AC02-06CH11357) ; Spain's Ministry of Science and Innovation ; Spain's Ministry of Science and Innovation ; European Regional Development(MAT2008-01489 ; European Regional Development(MAT2008-01489 ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Nature Science Foundation of China(40821091) ; National Nature Science Foundation of China(40821091) ; EF-0830093) ; EF-0830093) ; AGL2006-C03-02) ; AGL2006-C03-02)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72336]  
专题中国科学院地质与地球物理研究所
通讯作者Michel, F. Marc
作者单位1.Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA
2.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA
3.Univ Cordoba, Dept Ciencias & Recursos Agr & Forestales, E-14071 Cordoba, Spain
4.CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
5.Umea Univ, Dept Chem, SE-90187 Umea, Sweden
6.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab SKL LE, Beijing 100029, Peoples R China
7.Sandia Natl Labs, Albuquerque, NM 87185 USA
推荐引用方式
GB/T 7714		 Michel, F. Marc,Barron, Vidal,Torrent, Jose,et al. Ordered ferrimagnetic form of ferrihydrite reveals links among structure, composition, and magnetism[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2010,107(7):2787-2792.
APA Michel, F. Marc.,Barron, Vidal.,Torrent, Jose.,Morales, Maria P..,Serna, Carlos J..,...&Brown, Gordon E., Jr..(2010).Ordered ferrimagnetic form of ferrihydrite reveals links among structure, composition, and magnetism.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,107(7),2787-2792.
MLA Michel, F. Marc,et al."Ordered ferrimagnetic form of ferrihydrite reveals links among structure, composition, and magnetism".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 107.7(2010):2787-2792.

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来源：地质与地球物理研究所

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