Electron spin resonance studies of nanocrystalline SnO_(2) indicated that the experimental spectrum can be decomposed into two spectra attributed to crystalline and interfacial components respectively.The results conf...Electron spin resonance studies of nanocrystalline SnO_(2) indicated that the experimental spectrum can be decomposed into two spectra attributed to crystalline and interfacial components respectively.The results confirmed the proposed two components model of nanocrystalline materials.展开更多
Ⅰ. INTRODUCTION In the method of ESR dating of quartz grains in loess, the determination of the previously acquired geological dose is an important step. It has been supposed that by exposure to sunlight the ESR sign...Ⅰ. INTRODUCTION In the method of ESR dating of quartz grains in loess, the determination of the previously acquired geological dose is an important step. It has been supposed that by exposure to sunlight the ESR signal intensity of E′ center in quartz grains could be erased to zero or a limit value when the loess was transported by wind from desert to the deposition site, be-展开更多
Ⅰ. INTRODUCTIONSoon after J. G. Bednorz and K. A. Müller discovered the high T_C superconductor, they reported a zero magnetic field microwave absorption in Ba-La-Cu-O. Thereafter, this phenomenon has been obser...Ⅰ. INTRODUCTIONSoon after J. G. Bednorz and K. A. Müller discovered the high T_C superconductor, they reported a zero magnetic field microwave absorption in Ba-La-Cu-O. Thereafter, this phenomenon has been observed by ESR spectrometer in almost all kinds of high T_C展开更多
A very strong nonresonant low-field signal can be detected near and below zero resistance phase transition temperature T_c by either electron spin resonance (ESR) or nuclear magnetic resonance (NMR)in almost all syste...A very strong nonresonant low-field signal can be detected near and below zero resistance phase transition temperature T_c by either electron spin resonance (ESR) or nuclear magnetic resonance (NMR)in almost all systems of high T_c superconductive oxides. The essence of this phenomenon is that there is some loss absorption of electromagnetic radiant in the sample when it is in the normal state; and the absorption decreases obviously when it is in the superconducting state, but the absorption increases when the sample is in magnetic field, especially when the applied field H is greater than the superconducting展开更多
文摘Electron spin resonance studies of nanocrystalline SnO_(2) indicated that the experimental spectrum can be decomposed into two spectra attributed to crystalline and interfacial components respectively.The results confirmed the proposed two components model of nanocrystalline materials.
基金Project supported by the Structure Research Laboratory, Academia Sinica and Union Foundation of Seismological Science
文摘Ⅰ. INTRODUCTION In the method of ESR dating of quartz grains in loess, the determination of the previously acquired geological dose is an important step. It has been supposed that by exposure to sunlight the ESR signal intensity of E′ center in quartz grains could be erased to zero or a limit value when the loess was transported by wind from desert to the deposition site, be-
基金Project supported by the National Center for Research and Development on Superconductivity.
文摘Ⅰ. INTRODUCTIONSoon after J. G. Bednorz and K. A. Müller discovered the high T_C superconductor, they reported a zero magnetic field microwave absorption in Ba-La-Cu-O. Thereafter, this phenomenon has been observed by ESR spectrometer in almost all kinds of high T_C
基金Project supported by the National Center for Research and Development on Superconductivity.
文摘A very strong nonresonant low-field signal can be detected near and below zero resistance phase transition temperature T_c by either electron spin resonance (ESR) or nuclear magnetic resonance (NMR)in almost all systems of high T_c superconductive oxides. The essence of this phenomenon is that there is some loss absorption of electromagnetic radiant in the sample when it is in the normal state; and the absorption decreases obviously when it is in the superconducting state, but the absorption increases when the sample is in magnetic field, especially when the applied field H is greater than the superconducting
