Magnetic Anisotropy and Orbilal Magnetic Moment in Ordered FePt Nanoparticles
有序 FePt 纳米粒子的磁各向异性和轨道磁矩
基本信息
- 批准号:17310061
- 负责人:
- 金额:$ 9.77万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this study, we aimed to clarify the correlation between magnetic anisotropy and orbital moment in ordered alloys consisting of transition metal(TM; Fe or Co) and noble metal (NM; Pt or Au). Improvement in X-ray spectroscopic experiment and systematic measurement have provided the following outcomes with a comparison between nanometer-sized materials and the bulk sample(1) Experimental achievements:X-ray absorption spectroscopy has been extended to the range of high pressure up to 50 GPa. We have also succeeded in angle-resolved photoemission spectroscopy for the FePt_3 ordered alloy. These techniques are advantageous to studying the nanometer-sized materials in terms of electronic structure by a comparative analysis with the bulk sample. From X-ray magnetic circular dichroism (XMCD)at the Pt L_<2,3>-edges in CoPt thin films, the orbital component of Pt 5d states was estimated, consequently it has been revealed that the orbital moment is decreased with reducing the film thickness. To … More examine the anisotropy in the orbital component, the difference in dichroic intensity between out-of plane and in-plane geometries was also recorded. These techniques are available for understanding size effect; in particular, it is valuable to link in-situ measurement with sample preparation.(2) Scientific outcomes:For the role of NM in the ordered alloys, hybridization between NM 5d and TM 3d orbitals is important for forming the ordered structure, in consequence the spin-orbit interaction of NM 5d states is notable for the magnetic properties. For the perpendicular magnetization thin films, however, the enhancement in magnetic anisotropy constant is not directly associated with the magnitude of orbital moment, but may be ascribed to metallographic and crystallographic structures in the thin films. From the X-ray absorption experiments of Au_4Mn ordered alloy under high pressure, some discussion for Gruneisen parameter can be developed, and the magneto-volume effect should be examined on the basis of spin-fluctuation. Less
在这项研究中,我们的目的是澄清磁各向异性和轨道矩之间的相关性,在有序合金组成的过渡金属(TM; Fe或Co)和贵金属(NM; Pt或Au)。通过对X射线吸收光谱实验的改进和系统测量,将纳米材料与体样品进行了比较,取得了以下成果:(1)实验成果:将X射线吸收光谱的测量范围扩展到了50 GPa的高压范围。我们还成功地对FePt_3有序合金进行了角分辨光电子能谱分析。这些技术有利于通过与体样品的对比分析来研究纳米材料的电子结构。从CoPt薄膜中Pt L <2,3>边的X射线磁圆二色性(XMCD),估算了Pt 5d态的轨道分量,从而揭示了随着薄膜厚度的减小,Pt 5d态的轨道矩减小。到 ...更多信息 检查轨道分量中的各向异性,还记录了面外和面内几何形状之间的二向色性强度的差异。这些技术对于理解尺寸效应是有用的,特别是将原位测量与样品制备相结合是有价值的。(2)科学成果:对于NM在有序合金中的作用,NM 5d和TM 3d轨道之间的杂化对于形成有序结构是重要的,因此NM 5d状态的自旋-轨道相互作用对于磁性是显著的。对于垂直磁化薄膜,磁各向异性常数的增加与轨道矩的大小没有直接关系,而可能与薄膜的金属结构和晶体结构有关。从高压下Au_4Mn有序合金的X射线吸收实验中,可以对Gruneisen参数进行一些讨论,并从自旋涨落的角度考察磁体积效应。少
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Angle-resolved photoemission study of Pt(111)
Pt(111) 的角分辨光电子发射研究
- DOI:
- 发表时间:2008
- 期刊:
- 影响因子:0
- 作者:N. Tobita;他11名
- 通讯作者:他11名
"XMCD study under extreme conditions - Magnetic phase transition in itinerant electron system-"(invited)
《极端条件下的XMCD研究——巡回电子系统中的磁相变——》(特邀)
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:H.;Maruyama
- 通讯作者:Maruyama
Pt 5d Magnetic States in Ordered Fe-Pt Alloy under High Pressure Probed by Pt L_<2,3>-edges XMCD
Pt L_<2,3>-边 XMCD 探测高压下有序 Fe-Pt 合金中的 Pt 5d 磁态
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:N. Ishimatsu;他4名
- 通讯作者:他4名
高圧下Au L_<2,3>端XMCDによるAu_4MnのAu 5d磁気状態の研究
高压下Au L_<2,3>边缘XMCD研究Au_4Mn中Au 5d磁态
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:金田大輔;石松直樹;圓山裕;河村直己
- 通讯作者:河村直己
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MARUYAMA Hiroshi其他文献
MARUYAMA Hiroshi的其他文献
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{{ truncateString('MARUYAMA Hiroshi', 18)}}的其他基金
Selection of asset purchase and stock purchase: Empirical analysis of court-led bankruptcy firms
资产购买和股票购买的选择:法院主导破产企业的实证分析
- 批准号:
25380398 - 财政年份:2013
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Transmission of Traditional Culture and Conservation of the Environment through Empowering Local Residents with a Special Focus on CBD and TEK
通过增强当地居民的能力来传播传统文化和保护环境,特别关注 CBD 和 TEK
- 批准号:
24510045 - 财政年份:2012
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Pressure effects on magnetic and elastic properties in Au4Mn ordered alloy
压力对 Au4Mn 有序合金磁性能和弹性性能的影响
- 批准号:
23560788 - 财政年份:2011
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Construction of North Indian Classical Music Theory in Modern Era : Problems on Establishment of Raga Classification System
近代北印度古典音乐理论的建构:拉格分类体系建立的问题
- 批准号:
22820026 - 财政年份:2010
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Research Activity Start-up
A Preliminary Study on Lingbao Liturgy inTaiwan and Southeast China
台湾及东南地区灵宝礼仪初探
- 批准号:
22520042 - 财政年份:2010
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Quantitative Analysis of the Behavior of Investment Funds and Their Returns
投资基金行为及其回报的定量分析
- 批准号:
20530276 - 财政年份:2008
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
A Pilot Program of Brown Bear Conservation and Management based on Human Dimensions Research-in Cooperation with Residents in the Oshima Peninsula-
基于人文维度研究的棕熊保护和管理试点计划-与大岛半岛居民合作-
- 批准号:
18510030 - 财政年份:2006
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
An econometric analysis of the performance of reorganized firms : Using the re-listed firms' data
重组公司绩效的计量分析:利用重新上市公司的数据
- 批准号:
18530239 - 财政年份:2006
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
An econometric analysis of the economic effect caused by the increase of the number of corporate reorganization and merger & acquisitions carried out by the buyout funds.
企业重组兼并数量增加带来的经济效应的计量分析
- 批准号:
16530211 - 财政年份:2004
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
A Study on Historical Dynamics of the Religious Network Formation in Fujian and Taiwan.
闽台宗教网络形成的历史动态研究。
- 批准号:
15520424 - 财政年份:2003
- 资助金额:
$ 9.77万 - 项目类别:
Grant-in-Aid for Scientific Research (C)