Interspacing dependence of spin-dependent variable range hopping for cold-pressed Fe3O4 nanoparticles
文献类型：期刊论文
| 作者 | Song, NN ; Yang, HT ; Li, FY ; Li, ZA ; Han, W ; Ren, X ; Luo, Y ; Wang, XC ; Jin, CQ ; Zhang, XQ ; Cheng, ZH |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2013 |
| 卷号 | 113期号:18 |
| ISSN号 | 0021-8979 |
| 通讯作者 | Cheng, ZH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | The influence of the contact between monodisperse Fe3O4 nanoparticles (NPs) on the spin-dependent transport mechanism has been investigated by only changing the cold-press pressures from 20.0 MPa to 5.0 GPa. For the sample cold-pressed under 20.0 MPa, the temperature dependence of resistivity rho-T curve is best fitted by the log rho proportional to T-1/2 relation, suggesting the Efros's variable range hopping (VRH) mechanism, while the rho-T curves of the samples cold-pressed under 1.0 GPa to 5.0 GPa can be best fit with the relation of log rho proportional to T-1/4, revealing the Mott's VRH mechanism. The different mechanisms are related to the interspacing dependence of charging energy and exchange energy between NPs. Monte Carlo simulations indicated that the charging energy plays a dominant role in the former mechanism, while the spin-dependent exchange energy is dominated in the latter one. (C) 2013 AIP Publishing LLC. |
| 资助信息 | National Basic Research Program of China [2010CB934202, 2011CB921801, 2012CB933102]; National Natural Sciences Foundation of China [51071173, 50931006, 11034004] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57133]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Song, NN,Yang, HT,Li, FY,et al. Interspacing dependence of spin-dependent variable range hopping for cold-pressed Fe3O4 nanoparticles[J]. JOURNAL OF APPLIED PHYSICS,2013,113(18). |
| APA | Song, NN.,Yang, HT.,Li, FY.,Li, ZA.,Han, W.,...&Cheng, ZH.(2013).Interspacing dependence of spin-dependent variable range hopping for cold-pressed Fe3O4 nanoparticles.JOURNAL OF APPLIED PHYSICS,113(18). |
| MLA | Song, NN,et al."Interspacing dependence of spin-dependent variable range hopping for cold-pressed Fe3O4 nanoparticles".JOURNAL OF APPLIED PHYSICS 113.18(2013). |
入库方式： OAI收割
来源：物理研究所
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