Calculations for Dr. thesis, papers, and ...
Unauthorized reproduction is prohibited.
Please notify the author if you use any of the content.
Programs for calculating superconducting upper critical fields using the Julia language, based on the
WHH theory by N. R. Werthamer, E. Helfand, and P. Hohenberg, Phys. Rev. 47, 297 (1966).
two-band WHH theory by A. Gurevich Phys. Rev. B 67, 184515 (2003).
・最終更新:2025/04/24
Acquisition program for LeCroy HDO oscilloscope using Igor Pro
・Please refer to the 設定方法まとめPDF (*The connection between PC and LeCroy HDO: TCPIP形式. NI-VISA and LeCroy VICP passport are required)
・speed: 2 .5 GS/s * 5 us = 12.5 kS x 4 ch. →dataacquisition time < 0.1 s (depend on PC)
・Data acquisition time for 50MS x 4ch: ~1 min
*Note: If you do not enter “Sleep” or “VISARead” after “VISAWrite,” LeCroy may not accept the command.
・Reference: https://www.wavemetrics.com/code-snippet/lecroy-scope-trace-acquisition-over-ip-visa
・keyword: LeCroy, Teledyne LeCroy, data acquisition, Igor Pro, VICP, VISA, remote,
・last update: 2023/03/18
Macros for Igor Pro
Controlling devices using NI VISA
・Yokogawa DL850E.not completed yet
last update: 2024/03/16
for analysis
・Phase calibration for Lock-in Amp. system (last update: 2024/09/09)
CEF wavefunctions of Yb^{3+} in cubic crystal : 立方対称結晶場中(対称性: O_h) でJ多重項の波動関数を計算.希土類イオンはYb^{3+}を採用
キーワード:局在4f電子系,結晶場基底状態
Elastic constants in orthorhombic crystal : 斜方晶の弾性定数を導出.
キーワード:超音波,弾性定数,歪み
四極子と歪みに対するLandauの自由エネルギーとルジャンドル変換の関係について: 秩序変数Oに関する自由エネルギーFから感受率を計算する際に,「系の平衡条件からdF/dO = 0を計算すると」と言われる.なぜこれが重要なのかを考えたパワポ.
キーワード:ランダウ理論,ルジャンドル変換,相転移の現象論