Compositional Dependence of g-Factor and Damping Constant of GdFeCo Amorphous Alloy Films

Time-domain magnetization dynamics of sputtered GdFeCo (30 nm) amorphous alloy films was measured by pump-probe method using high-power ultra-short pulse fiber laser. The effective g-factor $g_{\rm eff}$ and effective damping constant $α_{\rm eff}$ of the GdFeCo films were estimated by using a numerical calculation of Landau–Lifshitz–Gilbert equation. The precessional frequency took a maximum near the magnetization compensation composition $C_{\rm M}$ of the GdFeCo, while the estimated $g_{\rm eff}$ and $α_{\rm eff}$ increased around the angular momentum compensation composition $C_{\rm A}$. The compositional dependences of $g_{\rm eff}$ and $α_{\rm eff}$ were roughly described by a mean-field model. The $g_{\rm eff}$ and $α_{\rm eff}$ were also estimated from the ferromagnetic resonance (FMR) spectra, and the data from the FMR spectra agreed well with those from the pump-probe measurement except for the composition near $C_{\rm M}$. The FMR method was unable to excite the magnetization near $C_{\rm M}$ because of the small net magnetization.journal articl

ガスト応答解析に基づく送電線実測振動の解釈

The gust response analysis is conducted for physically interpreting the large wind-induced vibrations measured in the different types of transmission lines with different numbers of bundled conductors. It is concluded that the field-measured vibration could be the gust responses, whose characteristics are dominated by the different structural as well as wind characteristics and well explained by the gust response theory.textapplication/pdfdepartmental bulletin pape

Evidence for Muon Neutrino Oscillation in an Accelerator-Based Experiment

journal articl

シュツガ コウボ ニ オケル シンキ DNA シュウフク カンレン SMC5-SMC6 フクゴウタイ ノ ドウテイ ト カイセキ

奈良先端科学技術大学院大学博士(バイオサイエンス)doctoral thesi

高浜原子力発電所植物群落の動態に関する調査・研究Ⅱ : 昭和55年度報告

application/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfBulletin of the Yokohama Phytosociological Society Vol.42boo

バングラデシュにおける河川堤防の機能と保全に関する調査研究

application/pdfバングラデシュのシラジホンジュ市、マニクゴンジュ市、ラジシャヒ市の道路堤防、ジャムナ川、パッダ川、マヌ川の河川堤防を訪問の際には堤防破壊に関する現地調査、情報収集と共に、現場から土を採取し、基本的物理性試験および締固め試験、透水試験、一軸圧縮試験、三軸圧縮試験等のせん断試験などによって土質性状を求めた。解析によって各地区におけるパラメータ特性の評価行った。ラジシャヒ市ゴダガリ地区の盛土堤防法面保護における実証実験を行い、現地に適した経済的に安価で土砂災害に強い盛土堤防を作り上げる新工法を提案した。Performance and maintenance of road embankments in Sirajgonj district, Manikgonj district, Rajshahi district, Jamuna river embankment, Padma river embankment and Manu river embankment were studied. Soil samples from the failure locations were collected during filed visit. Soil properties were determined by laboratory tests such as compaction tests, unconfined compression tests, triaxial tests and direct shear tests etc. Analytical investigations were performed to evaluate the soil parameters of the damaged areas. Field experiments for slope protection at Godagari Upazilla in Rajshahi district were carried out by using a new composite technology. Results of fields tests, laboratory tests and analyses indicated that the new composite technology is not only economical and strong for slope protection but also viable and appropriate in Bangladesh.平成19~22年度科学研究費補助金(基盤研究(B))研究成果報告書19405036research repor