Study on electronic structure of itinerant ferromagnetic Mn pnictides by spin and angle resolved photoemission and inverse photoemission spectroscopies

自旋角分辨光电子发射光谱和反光电子发射光谱研究流动铁磁锰磷族化物的电子结构

• 批准号: 11440097
• 负责人: TANIGUTI Masaki
• 金额: $ 8.38万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11440097/
• 关键词: spin polarized photoemission; spin polarized inverse photoemission; compact spin polarimeter; manganese pnictides; 薄膜単結晶試料; アンジュレータービームライン

The main purpose of this research is to develop the spin- and angle- resolved photoemission and inverse photoemission spectroscopy systems equipped with the compact spin polarimeter and the spin polarized electron gun. The systems will be connected with the undulator beamline in Hiroshima Synchrotron Radiation Center. The final goal is to investigate the spin dependent electronic states of itinerant ferromagnetic manganese pnictides using this system.In this fiscal year, we have finished the performance test for the spin polarized photoemission spectroscopy systems. We have designed and constructed the spin-polarized electron gun this fiscal year. Finally we have measured the electron transmission property and the energy resolution of the electron gun. Since the efficiency of inverse photoemission process is quite low compared to the photoemission process, it is important to take care of the following properties in regard to the photoelectron source and the electron gun.1) Stable and large amount of photocurrent from the NEA surface of GaAs cathode.2) High transmission property of the electron gun.The photocurrent of 10μA from GaAs and maximum cathode lifetime of 46 hours have been achieved. We have designed and constructed the electron gun with 7 cylindrical lens elements and 90 degrees cylindrical deflector. The measured electron transmission is estimated to be 41%. The above results show that our system is suitable for the measurement of SPIPES.

本研究的主要目的是发展自旋与角分辨光电子能谱与逆光电子能谱系统，并以小型自旋极化仪与自旋极化电子枪为装备。该系统将与广岛同步辐射中心的波荡器光束线连接。最终目标是利用该系统研究巡游铁磁锰磷属化合物的自旋相关电子态。在本财政年度，我们已经完成了自旋极化光电子能谱系统的性能测试。我们在本财政年度设计并建造了自旋极化电子枪。最后对电子枪的电子传输特性和能量分辨率进行了测量。由于逆光电发射过程的效率与光电发射过程相比相当低，关于光电子源和电子枪，注意以下特性是重要的：1）来自GaAs阴极的NEA表面的稳定和大量的光电流。2）电子枪的透射率高，GaAs光电流达10μA，阴极寿命最长达46小时。我们设计并制造了具有7个柱面透镜单元和90 °柱面偏转器的电子枪。测得的电子透射率估计为41%。上述结果表明，我们的系统是适用于SPIPES的测量。

项目成果

H.Sato: "Electronic structure of zinc-blende MnTe investigated by photoemission and inverse-photoemission spectroscopies"Phys.Rev.B. 61. 10622-10627 (2000)

H.Sato：“通过光发射和反光发射光谱研究闪锌矿 MnTe 的电子结构”Phys.Rev.B。

H.Sato: "Electronic structure of zinc-blende MnTe investigated by photoemission and inverse-photoemission spectroscopies"Physical Review B. 61(16). 10622-10627 (2000)

H.Sato：“通过光发射和反光发射光谱研究闪锌矿 MnTe 的电子结构”物理评论 B. 61(16)。

K.Shimada: "Spin-Resolved Core-Level and Valence-band photoemission spectroscopy of ferromagnetic MnAs"J.Electron Spectrosc.Relat.Phenom. 101-103. 383-387 (1999)

K.Shimada：“铁磁性 MnAs 的自旋分辨核心能级和价带光电子能谱”J.Electron Spectrosc.Relat.Phenom。

K.Shimada: "Fe Chalcogenides by X-ray Photoemission Spectroscopy"Surface Science Spectra. 6(4). 321-336 (2000)

K.Shimada：“通过 X 射线光电发射光谱测定铁硫属化物”表面科学光谱。

Hitoshi Sato: "Electronic structure of 5inc-blende MnTe investigated by photoemission and inverse-pnotoemission spectroscopies"Physical Review B. 61・15. 1-6 (2000)

佐藤仁：“通过光电子发射和逆光电子发射光谱研究 5inc 混合体 MnTe 的电子结构”物理评论 B. 61・15 (2000)。