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    • 2. 发明授权
    • Electron spin resonance spectrometer
    • 电子自旋共振光谱仪
    • US4782297A
    • 1988-11-01
    • US123535
    • 1987-11-20
    • Klaus-Dieter SchmalbeinKaroly Holczer
    • Klaus-Dieter SchmalbeinKaroly Holczer
    • G01R33/60G01R33/20
    • G01R33/60
    • An electron spin resonance spectrometer comprises a resonator arranged in a magnetic field of constant strength and high homogeneity and containing a sample. The resonator can be supplied, via a microwave bridge, with high-power microwave energy in the form of an intermittent signal. Measuring signals emitted by the resonator can be supplied to detector arrangements and signal evaluation arrangements. In order to be able to cut a pulse-shaped output signal of the microwave power amplifier off sharply at its trailing edge, the attenuator is designed as a switching stage comprising a circulator whose input is connected to the output of the microwave power amplifier. A subsequent circulator connection is wired up to a series connection comprising a microwave switching diode that can be switched via a control input and a waveguide termination, and another subsequent circulator connection is connected to the microwave bridge (FIG. 10).
    • 电子自旋共振光谱仪包括设置在恒定强度和高均匀性的磁场中并包含样品的谐振器。 可以通过微波桥将谐振器以间歇信号形式的高功率微波能量提供。 谐振器发射的测量信号可以提供给检测器布置和信号评估装置。 为了能够在其后沿切断微波功率放大器的脉冲状输出信号,衰减器被设计为包括循环器的开关级,输入端连接到微波功率放大器的输出端。 随后的循环器连接被连接到包括微波开关二极管的串联连接,微波开关二极管可以经由控制输入和波导终端进行切换,而另一个后续循环器连接连接到微波桥(图10)。
    • 3. 发明授权
    • Magnetic resonance method and apparatus for detecting an atomic
structure of a sample along a surface thereof
    • 用于检测样品沿其表面的原子结构的磁共振方法和装置
    • US5619139A
    • 1997-04-08
    • US393121
    • 1995-02-21
    • Karoly HolczerDieter SchmalbeinPeter Hoefer
    • Karoly HolczerDieter SchmalbeinPeter Hoefer
    • G01B7/34G01Q30/02G01Q60/08G01Q60/52G01R33/56G01R33/60G01R33/20
    • G01Q60/08B82Y35/00G01Q60/52G01R33/60G01R33/5604Y10S977/838Y10S977/84Y10S977/863Y10S977/865Y10S977/88Y10S977/96
    • A method and an apparatus are disclosed for detecting an atomic structure of a sample along a surface thereof. The method comprises arranging the sample in a constant magnetic field (B.sub.0) of predetermined field strength and high homogeneity and irradiating a high-frequency magnetic field (B.sub.1) of a predetermined frequency on the sample, wherein the fields (B.sub.0) and (B.sub.1) are oriented perpendicularly to each other. The method further comprises providing a force-sensitive sensor having a paramagnetic tip comprising a paramagnetic material. The sensor is placed in close vicinity to the sample such that the paramagnetic tip is in atomic interaction with the sample surface which means that the distance between the tip and the surface is in the order of between 1 and 10 .ANG.. The predetermined field strength and the predetermined frequency are set such that electron paramagnetic resonance (EPR) is excited within the tip paramagnetic material. The paramagnetic tip is then displaced parallel to the sample surface for mapping predetermined points on the sample surface. During displacing the tip the force exerted on the tip by a local inhomogeneous magnetic field (B.sub.loc) caused by atomic magnetic moments (m.sub.e,k) of the sample is measured.
    • 公开了一种用于检测样品沿其表面的原子结构的方法和装置。 该方法包括将样品置于具有预定场强和高均匀性的恒定磁场(B0)中,并且对样品照射预定频率的高频磁场(B1),其中场(B0)和(B1) 彼此垂直取向。 该方法还包括提供具有包括顺磁材料的顺磁性尖端的力敏感传感器。 将传感器放置在样品附近,使得顺磁性尖端与样品表面原子相互作用,这意味着尖端和表面之间的距离在1和10埃之间。 将预定的场强和预定频率设定为使得电子顺磁共振(EPR)在尖端顺磁性材料内被激发。 然后顺磁性尖端平行于样品表面移位,用于映射样品表面上的预定点。 在移动尖端期间,测量由样品的原子磁矩(me,k)引起的局部不均匀磁场(Bloc)施加在尖端上的力。
    • 4. 发明授权
    • Method of measuring pulsed electron spin resonance signals and pulsed
electron spin resonance spectrometer
    • 测量脉冲电子自旋共振信号和脉冲电子自旋共振光谱仪的方法
    • US5512829A
    • 1996-04-30
    • US310938
    • 1994-09-22
    • Karoly HolczerDieter SchmalbeinPeter Hofer
    • Karoly HolczerDieter SchmalbeinPeter Hofer
    • G01N24/10G01R33/54G01R33/60G01V3/00
    • G01R33/60G01R33/54
    • A pulsed electron spin resonance spectrometer is provided with a first microwave oscillator for generating measuring signals of a high microwave frequency of about 80 GHz or above. A second microwave oscillator generates auxiliary signals at a lower microwave frequency of about 12 GHz or below. A first mixer generates mixed signals by mixing a measuring signal with an auxiliary signal. A pulse shaping channel generates pulsed mixed signals having a pulse length sufficient for carrying out pulsed electron spin resonance experiments. Moreover, a measuring resonator is provided to which the pulsed mixed signals are applied. A second mixer generates an output signals of a lower microwave frequency by mixing the mixed signal outputted from the measuring resonator with a signal being derived from the first microwave oscillator. A pulse shaping channel is switched between the second microwave oscillator and the first mixer.
    • 脉冲电子自旋共振光谱仪设置有用于产生约80GHz或更高的高微波频率的测量信号的第一微波振荡器。 第二个微波振荡器以约12GHz或更低的较低微波频率产生辅助信号。 第一混频器通过将测量信号与辅助信号混合来产生混合信号。 脉冲整形通道产生具有足以进行脉冲电子自旋共振实验的脉冲长度的脉冲混合信号。 此外,提供了施加脉冲混合信号的测量谐振器。 第二混频器通过将从测量谐振器输出的混合信号与从第一微波振荡器导出的信号混合来产生较低微波频率的输出信号。 脉冲整形通道在第二微波振荡器和第一混频器之间切换。
    • 5. 发明授权
    • Electron spin resonance spectrometer
    • 电子自旋共振光谱仪
    • US4782296A
    • 1988-11-01
    • US123590
    • 1987-11-20
    • Klaus-Dieter SchmalbeinKaroly Holczer
    • Klaus-Dieter SchmalbeinKaroly Holczer
    • G01N24/10G01R33/60G01R33/20
    • G01R33/60
    • An electron spin resonance spectrometer comprises a resonator arranged in a magnetic field of constant strength and high homogeneity and containing a sample. The resonator can be supplied, via a microwave bridge, with microwave energy in the form of a continuous-wave signal (CW) or in the form of an intermittent signal (P). Measuring signals emitted by the resonator can be supplied to a detector arrangement and a signal evaluation arrangement. In order to be able to carry out individual experiments with continuous-wave signals or intermittent signals of low power or with intermittent signals of high power in arbitrary combination and with an arbitrary succession of microwave pulses, the spectrometer comprises a first channel for supplying a continuous-wave signal or an intermittent signal of small power in the mW range and a second channel for supplying an intermittent signal of high power in the W range. The channels are connected by their inputs to a common microwave source and united at their outputs. So the said channels can be selectively operated either individually or jointly.
    • 电子自旋共振光谱仪包括设置在恒定强度和高均匀性的磁场中并包含样品的谐振器。 可以通过微波桥将谐振器以连续波信号(CW)的形式或以间歇信号(P)的形式提供微波能量。 谐振器发射的测量信号可以被提供给检测器装置和信号评估装置。 为了能够以连续波信号或低功率间歇信号或任意组合的高功率间歇信号和任意连续的微波脉冲进行个别实验,光谱仪包括用于提供连续波 波信号或mW范围内的小功率的间歇信号,以及用于在W范围内提供高功率的间歇信号的第二通道。 这些通道的输入端连接到一个普通的微波源,并在其输出端进行联合。 因此,所述通道可以单独地或联合地选择性地操作。