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公开(公告)号：US3840865A
公开(公告)日：1974-10-08
申请号：US26594372
申请日：1972-06-23
Applicant: IBM
Inventor： HOLTZBERG F , VON MOLNAR S , MAYADAS A , THOMPSON W
Abstract: Tunnel junctions are used to detect magnetic domains, such as bubble domains, using the change in Fermi level of one (or both) electrodes due to the magnetic field of the domain. The Fermi level shift causes the tunnel barrier height to change, leading to a change in tunneling conductance which is detectable as a current or voltage change. A simple tunnel junction in flux coupling proximity to the magnetic domains is suitable, but more sensitive detectors are made using Schottky barrier junctions, and magnetic semiconductors which exhibit conduction band splitting due to the stray field of the domains. In another embodiment, the magnetic sheet supporting the domains provides the tunnel barrier for sensing of the domains within it. Detection of submicron domains is easily achieved.
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公开(公告)号：US3778893A
公开(公告)日：1973-12-18
申请号：US15188571
申请日：1971-06-10
Applicant: IBM
Inventor： THOMPSON W
CPC classification number: H03B15/00 , H01L39/2493 , H01S1/02 , H01S3/1683 , Y10S505/854 , Y10S505/922 , Y10T29/49014
Abstract: A superconducting oscillator for generating millimeter and infrared radiation and a method for fabricating these oscillators. A Josephson junction (weak link or tunneling juntion) is located between electrodes which furnish DC current to the junction and also define a resonant cavity for electromagnetic radiation from the junction. Thus, an internal cavity is provided and increased power outputs over a wide frequency range are possible. The oscillator is produced by spark erosion between the electrodes at liquid helium temperatures, which forms a very small junction and cavity resonator.
Abstract translation: 一种用于产生毫米波和红外辐射的超导振荡器和一种用于制造这些振荡器的方法。 约瑟夫逊结（弱连接或隧道连接）位于向连接处提供直流电流的电极之间，并且还限定了用于来自结的电磁辐射的谐振腔。 因此，提供内部空腔并且可以在较宽的频率范围内增加功率输出。 振荡器由电极之间在液氦温度下的火花腐蚀产生，形成非常小的结和空腔谐振器。
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公开(公告)号：US3720598A
公开(公告)日：1973-03-13
申请号：US3720598D
申请日：1970-12-31
Applicant: IBM
Inventor： THOMPSON W
CPC classification number: H01J37/32055 , C22F3/00 , H01L39/00
Abstract: This disclosure provides apparatus for achieving rapidly a high temperature arc discharge in the region of a material to be vaporized. Surrounding the region of the arc discharge is a cryogenic fluid against which both the arc and the vaporized produces exert pressure. The effect of the presence of the cryogenic fluid adjacent to the high temperature region is to constrain the arc discharge strongly and to quench rapidly the material in the vapor state to the solid state. As a consequence of the localized heating and rapid quenching in the cryogenic arc furnace, special materials and physical states thereof are achieved. Illustratively, chemical products and amorphous conditions of materials are achieved for the practice of this disclosure not heretofore contemplated in the practice of the prior art. For an embodiment of this disclosure, the material to be vaporized is ab initio established in location for a capacitive arc discharge and the capacitor plates are caused by mechanical shock to approach each other so that the discharge occurs preferentially at a preselected path on the material. Practice of this invention is readily extrapolated to the very high temperatures required for fusion experiments in liquid deuterium, e.g., greater than 100,000*C.
Abstract translation: 本公开提供了用于在待蒸发的材料的区域中快速实现高温电弧放电的装置。 围绕电弧放电的区域是低温流体，电弧和蒸发产生的低温流体施加压力。 与高温区域相邻的低温流体的存在的影响是强烈地约束电弧放电并将蒸气状态的材料快速淬火至固态。 由于在低温电弧炉中的局部加热和快速淬火的结果，实现了特殊材料及其物理状态。 说明性地，实现本公开的材料的化学产品和无定形条件是在现有技术的实践中未被考虑的。
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