Development of Magnetoresistive Halfmetals and Halfmetallic Composites for Spintronics
用于自旋电子学的磁阻半金属和半金属复合材料的开发
基本信息
- 批准号:15206071
- 负责人:
- 金额:$ 26.62万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2005
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Our three-year project was focused on halfmetallic (HM) oxide materials that are conducting ferromagnets with 100 % spin-polarized carriers (in an ideal case). Such materials form the bases for tunneling-type magnetoresistance (TMR) devices application of which is found in the presently emerging new technology called spintronics. Among the handful of HM materials discovered so far, B-site ordered double-perovskite (DP) oxides, A_2B'B''O_6, including the prototype Sr_2FeMoO_6 compound are the most promising candidates for room-temperature (RT) low-field (LF) application. The B-site ordered DPs were also in the central role in the present project, though related perovskite-derived systems were investigated as well. The goal of the project was to search for the limits of these materials to function as RT-LF-TMR materials by means of controlling their intrinsic and extrinsic material characteristics. The research included the following aspects:(i) Tailoring of atomic-level intrinsic characteristics of Sr_2FeMoO_6 and related DP oxides(ii) Control of the size of grains/magnetic domains by the choice of synthesis conditions(iii) Design of composite structures to enhance the RT-LF TMR characteristics(iv) Search for novel HM compound(s) among perovskite oxidesOur unique (new) material design and tailoring scheme itself, comprising atomic-to-macroscopic dimensional manipulation of various intrinsic and extrinsic material parameters, turned out to be highly successful. We positively believe that our approach will be found useful in future too to achieve a more organized and highly productive design scheme for a wide range of frontier materials.
我们为期三年的项目专注于半金属(HM)氧化物材料,这些材料是具有100%自旋极化载流子的铁磁体(在理想情况下)。这种材料形成了隧道型磁阻(TMR)器件的基础,其应用发现于目前新兴的称为自旋电子学的新技术中。在迄今发现的少数几种HM材料中,B位有序双钙钛矿(DP)氧化物A_2B'B "O_6,包括原型Sr_2FeMoO_6化合物,是最有希望用于室温(RT)低场(LF)应用的候选材料。B位有序的DP也在本项目中发挥核心作用,尽管相关的钙钛矿衍生系统也进行了研究。该项目的目标是通过控制这些材料的内在和外在材料特性来寻找这些材料作为RT-LF-TMR材料的极限。研究内容包括以下几个方面:(i)Sr_2FeMoO_6及其相关DP氧化物的原子级本征特性的定制(ii)通过选择合成条件控制晶粒/磁畴的尺寸(iii)设计复合结构以增强RT-LF TMR特性(iv)在钙钛矿氧化物中寻找新型HM化合物我们独特的(新)材料设计和定制方案本身,包括各种本征和非本征材料参数的原子到宏观尺寸的操纵,被证明是非常成功的。我们坚信,我们的方法在未来也将被发现是有用的,可以为各种前沿材料实现更有组织和更高效的设计方案。
项目成果
期刊论文数量(292)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Room-Temperature Ferromagnetism in Sr_<1-x>Y_xCoO_<3-δ> (0.2【less than or equal】x【less than or equal】0.25)
Sr_<1-x>Y_xCoO_<3-δ>室温铁磁性(0.2【小于等于】x【小于等于】0.25)
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:木村博道;秋山英三;W.Kobayashi
- 通讯作者:W.Kobayashi
Frontiers in Magnetic Materials (A.V.Narlikar (Ed))
磁性材料前沿(A.V.Narlikar(主编))
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:M.Karppinen;H.Yamauchi
- 通讯作者:H.Yamauchi
Structural and magnetic properties of MSr_2Y_<1.5>Ce_<0.5>Cu_2O_z (M-1222) compounds with M=Fe and Co
M=Fe和Co的MSr_2Y_<1.5>Ce_<0.5>Cu_2O_z(M-1222)化合物的结构和磁性能
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:V.P.S.Awana;A.Gupta;H.Kishan;S.K.Malik;W.B.Yelon;J.Linden;M.Karppinen;H.Yamauchi;D.C.Kundaliya
- 通讯作者:D.C.Kundaliya
High-Tcsuperconductivity in three-fluorite-layer copper oxides. II.(Cu,Mo)Sr2(Ce,Y)3Cu2O11+δ
三萤石层铜氧化物的高温超导性 II.(Cu,Mo)Sr2(Ce,Y)3Cu2O11+δ。
- DOI:10.1103/physrevb.70.174514
- 发表时间:2004
- 期刊:
- 影响因子:3.7
- 作者:T. Watanabe;M. Karppinen;T. Motohashi;T. Nagai;Y. Matsui;H. Yamauchi
- 通讯作者:H. Yamauchi
Frontiers in Superconducting Materials (A.V.Narlikar (Ed))
超导材料前沿(A.V.Narlikar(主编))
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:M.Karppinen;H.Yamauchi
- 通讯作者:H.Yamauchi
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KARPPINEN Maarit其他文献
KARPPINEN Maarit的其他文献
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{{ truncateString('KARPPINEN Maarit', 18)}}的其他基金
ミスフィット層状酸化物材料の探索とテーラリング
错配层状氧化物材料的探索和定制
- 批准号:
04F04411 - 财政年份:2004
- 资助金额:
$ 26.62万 - 项目类别:
Grant-in-Aid for JSPS Fellows
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