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Quantum Theory for Interfacial Roughness and angle dependence of Giant Magnetoresistance in Magnetic Multilayers

Communications in Theoretical Physics 2001年第3期35卷 355-359页

作者： TAOYong－Chun DONGZheng－Chan NationalLaboratoryofSolidStateMicrostructuresandDepartmentofPhysics NanjingUniversityNanjing210093China NationalLaboratoryofSolidStateMicrostructuresandDepartmentofPhysics Nanji

The giant magnetoresistance (GMR) in magnetic multilayers with current in the plane of the layers is studied by using the quantum-statistical Green's function approach, in which the effects of the interfacial roughness and magnetization configuration on the GMR are included. It is shown that the maximal GMR first increases and then decreases with increasing interfacial roughness, exhibiting a peak at an optimum value of interfacial roughness. An approximately linear dependence of GMR on is obtained, where is the angle between magnetizations of the two successive ferromagnetic layers. Furthermore, the maximal GMR is found to increase with increasing the number of bilayers.

关键词： giant magnetoresistance interfacial roughness angle dependence Green's function magnetic multilayers

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Measurement on transmittance uniformity and angle dependence of automatic welding filter(AWF)

Measurement on transmittance uniformity and angle dependence...

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作者： LIU Qinggang SHI Wenze ZHUANG Yihuan GUO Dehua State Key Laboratory of Precision Measurement Technology and Instruments Tianjin University China National Institute of Standardization

In order to realize the measurement of transmittance uniformity and angle dependence to detect the personal protection quality parameters of AWF,an innovative AWF measuring instrument including scanning controller based on 4-dimensional motion platform,which can realize the measurement of the above two indexes,are trial produced and tested according to the requirements in the national standard of *** experiment results of transmittance uniformity and angle dependent of AWF achieved by this instrument have good consistency with the data provided by the *** shows that the measurement system has achieved high accuracy and stability in accordance with the national standard of China,and can test and analyze the related parameters of popular types of AWF according to the requirements in the national standard of China.

关键词： automatic welding filter(AWF) transmittance uniformity angle dependence 4-D automatic scanning platform AWF parameter measuring equipment test and analysis

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Engineering-based design and fabrication procedure for mid-temperature REBCO magnets accommodating the strong Ic anisotropy

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Superconductivity 2022年第1期1卷 34-44页

作者： Zili Zhang Benzhe Zhou Jianhua Liu Lei Wang Qiuliang Wang Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

An engineering-feasible design and fabrication procedure for REB2aCu3O7-x(REBCO)magnets based on the strong Ic angle dependence at moderate temperatures(40–77 K)was *** this procedure,the Ic value of every REBCO coil of the magnet is calculated from the Ic(B,θ)data of REBCO tape at operating temperature with different applied fields,which is called the“full field-angle dependent Ic method.”This approach has significantly higher accuracy than the conventional method,which only focuses on the Ic value at the coil with the highest perpendicular field ***,the fitted lift factor at 45 K with different applied fields was closely related to the minimum Ic value at 77 K and 0.5 *** engineering-feasible design and fabrication procedure for the REBCO magnet was developed on the basis of the Ic values calculated via the“full field-angle dependent Ic method”and lifting-factor fitted method,and it had a design error of<5%.The proposed technique is a more accurate method for the design and fabrication of cooling REBCO coils and will improve the applicability of REBCO magnets in this temperature range.

关键词： REBCO Current margin angle dependence Artificial pinning center

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