Current-driven Vortex Dynamics at Zero Field in Thick and Thin Films Probed by Voltage Noise(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

スポンサーリンク

概要

• 論文の詳細を見る

• We have measured current (I)-induced voltage (V) noise S_v of thick and thin amorphous Mo_xSi_<1-x> films with different transition temperatures T_c, but with similar critical current densities, to study vortex dynamics driven by I at zero field below T_c. Origin of noise is due to density fluctuations of thermally created free vortices and antivortices in the presence of I. With increasing temperature T, S_v/V shows a decrease and tends to zero near T_c, where S_v/V for the thick and thin films follows the single scaling functions expressed as S_v/V = A(l - T/T_c)^n (n ≈ 5-6) with large and small values of A, respectively. This means that the physical mechanism responsible for the T dependence of noise (or vortex-density fluctuations) for the thick and thin films is qualitatively similar, but quantitatively dominated by the dimensionality.

• 社団法人日本物理学会の論文
• 2004-10-15

著者

• Kamada M.

  Research Center For Development Of Far-infrared Region University Of Fukui

• Okuma S.

  Research Center For Low Temperature Physics Tokyo Institute Of Technology

関連論文

• 25aXG-10 Preliminary Design of a Submillimeter Wave Powerful Large Orbit Gyrotron Using a Compact Power Supply 100 keV
• Plastic Motion of Current-Driven Vortex Glass in the Corbino Disk (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
• Current-driven Vortex Dynamics at Zero Field in Thick and Thin Films Probed by Voltage Noise(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

スポンサーリンク