Construction of a Tandem Multipass Fabry-Perot Sprectometer and Its Application to Spin Wave Study

串联多通道法布里-珀罗频谱仪的构建及其在自旋波研究中的应用

• 批准号: 05555084
• 负责人: YOSHIHARA Akira
• 金额: $ 3.97万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555084/
• 关键词: Brillouin scattering; Tandem Fabry-Perot interferometer; Magnetic film; Spin wave; Magnetic constant; Magnetic anisotropy; 表面磁気異方性; タンデム型ファブリ・ペロー分光器; 反強磁性結合多層膜; フェリ磁性多層膜

During this research project, we have constructed a Sandercock-type tandem multipass Fabry-Perot interferometer, which can be operated in 3+3 or 3+5 pass mode. We have also developed master/slave and time-sharing techniques and electronics to stabilize the interferometer during a long spectrum accumulation period of over several hours.Using the tandem interferometer, we have investigated collective spin waves existing in a sputtered soft ferromagnetic CoNbZr thin film, and a MBE-grown ultrathin epitaxial bcc Fe (001) wedge at room temperature. We could successfully observe scattering from spin waves for both materials. For the CoNbZr film, observation of the standing spin waves up to fifth order allowed us to determine a set of the basic magnetic constants, including the exchange stiffness constant. We could also observe scattering from spin waves in the ultrathin Fe wedge for various Fe thicknesses between d_<Fe>=9A and 2.6A.We could determine the g-factor, saturated magnetization and surface magnetic anisotropy constants of the wedge as a function of the Fe thickness. We found that the Fe wedge consists of two magnetically different portions at zero magnetic field. One is magnetized in-plane for d_<Fe>>3.0A,and the other magnetized out-of-plane for d_<Fe><3A.

在本研究项目中，我们构建了sandercock型串联多通法布里-珀罗干涉仪，该干涉仪可以工作在3+3或3+5通模式。我们还开发了主/从和分时技术和电子设备，以在几个小时的长频谱积累期间稳定干涉仪。利用串联干涉仪，研究了室温下溅射软铁磁CoNbZr薄膜和mbe生长超薄外延bcc Fe（001）楔中的集体自旋波。我们可以成功地观察到两种材料的自旋波散射。对于CoNbZr薄膜，观察到五阶的驻波使我们能够确定一组基本的磁常数，包括交换刚度常数。在d_<Fe>=9A ~ 2.6A范围内，我们还可以观察到超薄铁楔中自旋波的散射。我们可以确定楔形板的g因子、饱和磁化强度和表面磁各向异性常数是铁厚度的函数。我们发现在零磁场下，铁楔由两个磁性不同的部分组成。一个在d_<Fe>>3.0A时为面内磁化，另一个在d_<Fe><3A时为面外磁化。

项目成果

A.Yoshihara: "Brillouin Scattering Determination of Magnetic and Elastic Constants in Invar-type La (Fe_XAl_<1-X>) _<13> Amorphous Alloy Films" J.Appl.Phys.75. 1733-1738 (1994)

A.Yoshihara：“因瓦型 La (Fe_XAl_<1-X>) _<13> 非晶合金薄膜中磁和弹性常数的布里渊散射测定”J.Appl.Phys.75。

G.S.Bains: "Brillouin Scattering From Spin Waves in Co/Gd Multilayer Films" J.Magn.Magn.& Mat.126. 329-332 (1993)

G.S.Bains：“Co/Gd 多层薄膜中自旋波的布里渊散射”J.Magn.Magn。

A. Yoshihara: "Brillouin Scattering from Spin Waves in an Ultrathin Fe Wedge" Jpn. J. Appl. Phys. Suppl.34-1. 217-219 (1995)

A. Yoshihara：“超薄铁楔中自旋波的布里渊散射”Jpn。

A.Yoshihara: "Magnon Brillouin Scattering from an Amorphous CoNbZr Thin Film" Jpn J.Appl.Phys.Suppl.33. 3927-3928 (1994)

A.Yoshihara：“非晶 CoNbZr 薄膜的磁振子布里渊散射”Jpn J.Appl.Phys.Suppl.33。

K.Takanashi: "Brillouin Scattering Study on Dynamical Properties of a Viscoelastic Liquid Propylene Glycol Using a Tandem Fabry-Perot Interferometer" Jpn.J.Appl.Phys.33(掲載予定). (1994)

K. Takanashi：“使用串联法布里-珀罗干涉仪对粘弹性液体丙二醇的动态特性进行布里渊散射研究”Jpn.J.Appl.Phys.33（待出版）。