Development of High Performance Exchange Bias Materials by Analyzing and Controlling Interfacial Induced Uncompensated Antiferromagnetic Spins

通过分析和控制界面引起的未补偿反铁磁自旋开发高性能交换偏置材料

• 批准号: 20360133
• 负责人: TSUNODA Masakiyo
• 金额: $ 11.81万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360133/
• 关键词: 物性実験; 磁性; 磁気記録; X線; 分光; 交換磁気異方性; 磁気円二色性; 磁気異方性; ハードディスク; MRAM; スピンエレクトロニクス; ハードデイスク

A correlation between uncompensated (UC)antiferromagnetic (AF)spins and exchange bias (E. B.)strength was investigated for Mn_<74> Ir_<26>/Co_<100-x> Fe_x bilayers. The E. B. strength had a maximum at x=25 at.%, and the x-ray magnetic circular dichroism of Mn, representing the UC-AF spins, changed systematically in sign and magnitude with respect to x. A linear correlation was found between the E. B. strength and the root mean square magnitude of the UC-Mn spins. The hidden parameter connecting these two quantities might be exchange coupling energy at the hetero-interface, which varies as a function of the ferromagnetic layer composition. Based on the above findings, we succeeded to induce large (> 1. 2 erg/cm^2)E. B. strength on L1_2-Mn_3Ir/Co_<65> Fe_<35> bilayers with inserting an ultra-thin Co-Fe layer which induces large Mn-XMCD.

研究了 Mn_<74>Ir_<26>/Co_<100-x>Fe_x 双层的未补偿（UC）反铁磁（AF）自旋与交换偏压（E.B.）强度之间的相关性。 E. B. 强度在 x=25 at.% 处具有最大值，并且代表 UC-AF 自旋的 Mn 的 X 射线磁圆二色性在符号和大小上相对于 x 系统地变化。 A linear correlation was found between the E. B. strength and the root mean square magnitude of the UC-Mn spins.连接这两个量的隐藏参数可能是异质界面处的交换耦合能量，该能量随着铁磁层成分的函数而变化。 Based on the above findings, we succeeded to induce large (> 1. 2 erg/cm^2)E. B. strength on L1_2-Mn_3Ir/Co_<65> Fe_<35> bilayers with inserting an ultra-thin Co-Fe layer which induces large Mn-XMCD.

项目成果

γ-Mn-Ir/Fe-Co-Ni積層膜の交換磁気異方性と強磁性層結晶構造との相関

γ-Mn-Ir/Fe-Co-Ni叠层薄膜交换磁各向异性与铁磁层晶体结构的相关性

• 发表时间: 2010
• 期刊: Journal of Magnetics Society of Japan
• 作者: 高橋宏和;角田匡清;三俣千春;高橋研
• 通讯作者: 高橋研

Correlation between exchange bias field and domain size of ferromagnetic layer in Mn-Ir / Co-Fe bilavers

Mn-Ir/Co-Fe 双体中交换偏置场与铁磁层磁畴尺寸的相关性

• 发表时间: 2009
• 期刊: Journal of Applied Physics 105
• 作者: 福島俊之;高宮健吾;土方泰斗;矢口裕之;吉田貞史;岡野真人;吉田正裕;秋山英文;窪谷茂幸;尾鍋研太郎;片山竜二;D.Y.Kim;平島知彦;H. Takahashi
• 通讯作者: H. Takahashi

Enhanced Exchange Anisotropy by Ultra-Thin Co_xFe_<100-x>(x>80) Layer Insertion at the Interface of L1_2-Ordered Mn_3Ir/Co_<65>Fe_<35> Bilayers

L1_2有序Mn_3Ir/Co_<65>Fe_<35>双层界面处超薄Co_xFe_<100-x>(x>80)层插入增强交换各向异性

• 发表时间: 2008
• 期刊: IEEE Transaction on Magnetics 44
• 作者: K. Komagaki;M. Tsunoda;H. Takahashi;K. Noma;H. Kanai;K. Kobayashi;Y. Uehara;and M. Takahashi;橘高明信;C. Mitsumata;樋口卓也;M. Tsunoda;稲田智志;K. Komagaki
• 通讯作者: K. Komagaki

強磁性/反強磁性積層膜の交換磁気異方性と界面非補償反強磁性スピンとの相関～ハイゼンベルグモデルによる検討～

铁磁/反铁磁堆叠薄膜中交换磁各向异性与界面未补偿反铁磁自旋之间的相关性〜使用海森堡模型进行研究〜

• 发表时间: 2009
• 作者: 三俣千春;角田匡清、高橋宏和、中村哲也、高橋研;秋山英文;高橋宏和;三俣千春
• 通讯作者: 三俣千春

Tailor-made nano-structured materials for perpendicular recording media and head—precise control of direct/indirect exchange coupling

用于垂直记录介质和磁头的定制纳米结构材料——直接/间接交换耦合的精确控制

• DOI: 10.1016/j.jmmm.2008.05.008
• 发表时间: 2009
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: M. Takahashi;M. Tsunoda;S. Saito
• 通讯作者: S. Saito