Experimental verification of relativistic spin-scattering in low energy TEM

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651123
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural science
• Research Institution: Nagoya University
• Principal Investigator: TANAKA Nobuo 名古屋大学, エコトピア科学研究所, 教授 (40126876)
• Co-Investigator(Kenkyū-buntansha): SAITOH Koh 名古屋大学, エコトピア科学研究所, 准教授 (50292280)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: スピン偏極電子線の相互作用 / TEM / 磁性体薄膜 / マルチスライスシミュレーション

Outline of Final Research Achievements

(1) In order to estimate the interaction between spin-polarized electrons and specimens, we derived the interaction terms by starting with Dirac's equation, and obtained the wave functions below the specimens which are fit for multislice method. By the procedure, we succeeded in inclusion the interaction terms into multislice method. (2) In order to obtain TEM images
by electron pulse of picosecond, we adopted two methods. One is to use continuos laser and acoustic-optical modulator (AOM) and to obtain 25 nanosecond electron pulses for qualification of the pulse. Another is to use mode-look Ti-Sapphire laser to obtain 20 picosecond electron pulse. For accurate estimation of the pulse-width, we have developed a streak camera method using electrons. (3) We have developed a new method of measuring the phase difference of electrons and successfully resulted in detection less than 1.5 rad.

Free Research Field

ナノ構造科学、電子顕微鏡学