25-2 Magnetic field 物理学是整个自然科学和现代工程技术的基础。英文版大学物理课程的开设,首先是使学生掌握专业所必须的物理基础知识和专业词汇;进而要让学生对物理学的内容和方法、工作语言、概念和物理图像,其历史、现状和前沿等方面,从整体上有个全面的了解。这是
the refs.30,31,32introduced synchrotron intensity gradient (SIG) as a way to map the magnetic fields. The fast turbulent reconnection in MHD turbulence leads to the mixing of magnetized plasma perpendicular to the direction of the local magnetic field. This results in anisotropic structures of tur...
Total magnetic field contours (black lines) over topography (topography data are from Smith et al. 201065). Field contours follow the crater topography in Houzeau crater, and in the eastern half of the unnamed crater, suggesting crater fill deposits are the source of the magnetized material. ...
7.4.Flux lines at an anomaly. A sensor positioned on the inside (magnet side) of the pipe is typically used to measure the magnetic field adjacent to the pipe wall. At a metal-loss anomaly, the sensor records a higher flux density or magnetic field, which indicates the presence of an an...
The measured magnetic field profile shows a local maximum where the reconnecting field lines of opposite polarities closely approach each other, known as the reconnection X point. The measurements also reveal a local minimum near the bottom of the current sheet above the flare loop-top, referred ...
Using Hamiltonian models for the magnetic field lines, we propose a methodology to improve their confinement through the creation of transport barriers. A local modification of the safety profile creating a low-shear zone is shown to be sufficient to locally enhance drastically the regularity of the...
The recording of magnetic information on the medium is based on specific magnetic grain properties. These magnetic particles have a preferred direction of magnetization (easy axis) in the absence of the external magnetic field. Modern recording media are based on perpendicular magnetic recording, that...
SMF : static magnetic field(s) ST3GAL5 : β-galactoside α-2,3-sialyltransferase 5 TLR4 : toll-like receptor 4.References Wiltschko W, Wiltschko R: Magnetic orientation in birds. J Exp Biol. 1996, 199: 29-38. 10.1016/0022-0981(95)00166-2. Article PubMed Google Scholar Wiltschko...
26. The magnetic properties in these thin films were observed by Barturen et al.27 revealing the formation of striped magnetic domains. Fin et al. further investigated the in-plane rotation of stripe domains under the application of magnetic field in 65-nm-thick Fe80 Ga20 films28. Mechanical ...
The negatively charged nitrogen-vacancy center (NV) presents remarkable spin-dependent optical properties that make it an interesting tool for magnetic field sensing. In this paper we exploit the polarization properties of the NV center absorption and emission processes to improve the magnetic sensitivity...