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.

在本研究计划中，我们已建立一个Sandercock型的串联多程法布里-珀罗干涉仪，它可以在3+3或3+5程模式下工作。我们还发展了主/从和分时技术和电子学，以稳定在一个长的光谱积累期间超过几个小时的tandem干涉仪，我们已经研究了集体自旋波存在于溅射的软铁磁CoNbZr薄膜，和MBE生长的外延bcc Fe（001）楔在室温下。我们可以成功地观察到这两种材料的自旋波散射。对于CoNbZr膜，观察到的自旋驻波五阶使我们能够确定一组基本的磁性常数，包括交换刚度常数。在不同Fe厚度（d =9A ~ 2.6A）下，我们还观察到了自旋波在铁楔中的散射<Fe>，并确定了铁楔的g因子、饱和磁化强度和表面磁各向异性常数随Fe厚度的变化。我们发现铁楔在零磁场下由两个磁性不同的部分组成。当d&gt; 3.0A时，一个面内磁化<Fe>，另一个面外磁化，d <Fe>&lt;3A。

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）。