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1 Dec 1976

Volume 29, Issue 11, pp. 691-758

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Collective synchronization of arrays of superconducting thin‐film microbridges

T. D. Clark and P. E. Lindelof

Appl. Phys. Lett. 29, 751 (1976); http://dx.doi.org/10.1063/1.88935 (3 pages) | Cited 10 times

Online Publication Date: 28 August 2008

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Square networks (arrays) of superconducting thin‐film ’’Dayem’’ microbridges have been investigated. Due to the uniform properties of our bridges, it was particularly easy to collectively synchronize these networks to a microwave field. Analogue computer calculations indicate that to obtain a free‐running single‐frequency 2×2 network, the diagonal pairs of junctions must be matched approximately to each other and be different from the other pair. We expect this to be a necessary condition for frequency and phase locking in larger networks, but as yet we have not realized this situation experimentally.
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85.25.Dq Superconducting quantum interference devices (SQUIDs)
85.25.-j Superconducting devices
74.50.+r Tunneling phenomena; Josephson effects

Switching of magnetic bubble states

P. Dekker and J. C. Slonczewski

Appl. Phys. Lett. 29, 753 (1976); http://dx.doi.org/10.1063/1.88936 (4 pages) | Cited 8 times

Online Publication Date: 28 August 2008

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Pulsed‐field procedures for switching magnetic bubbles between four different wall states having unit winding number are proposed. Experiments establish operating margins for the transitions and distinguish the two unichiral states for the first time.
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75.60.Ch Domain walls and domain structure
85.70.Ge Ferrite and garnet devices

Production processes for excited states of Cd+ in helium‐cadmium afterglows

M. Kamin and L. M. Chanin

Appl. Phys. Lett. 29, 756 (1976); http://dx.doi.org/10.1063/1.88937 (3 pages) | Cited 1 time

Online Publication Date: 28 August 2008

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A preliminary mass spectroscopic investigation of helium‐cadmium afterglows indicates that excited cadmium ions are produced by Penning and charge exchange reactions involving excited species of both atomic and molecular helium. Relative values of the reaction rate constants are presented showing those for the molecular particle processes to be the largest.
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42.55.Lt Gas lasers including excimer and metal-vapor lasers
34.50.-s Scattering of atoms and molecules
52.20.Hv Atomic, molecular, ion, and heavy-particle collisions
82.20.Pm Rate constants, reaction cross sections, and activation energies
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