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19 Apr 1999

Volume 74, Issue 16, pp. 2253-2392

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Direction-oriented quasiparticle injection and microwave emission in an ErBa2Cu3Oy superconductor

K. Lee, H. Yamaguchi, W. Wang, E. Kume, and I. Iguchi

Appl. Phys. Lett. 74, 2375 (1999); http://dx.doi.org/10.1063/1.123856 (3 pages) | Cited 8 times

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We report the anisotropic microwave emission properties of ErBa2Cu3Oy/insulator/Au (S/I/N) tunnel junctions due to the direction-oriented quasiparticle injection. Two types of samples with different S/I/N tunnel junction geometries are prepared: one allows the quasiparticle injection mainly along the c axis and the other only into the ab plane. The results show the presence of strong anisotropic behavior of microwave emission according to the direction of quasiparticle injection. © 1999 American Institute of Physics.
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74.78.Fk Multilayers, superlattices, heterostructures
74.50.+r Tunneling phenomena; Josephson effects
85.25.Cp Josephson devices

Interfacial reactions and evolution of the magnetic anisotropy in Tb/Fe multilayers irradiated by swift heavy ions

J. Juraszek, A. Fnidiki, J. Teillet, F. Richomme, N. H. Duc, M. Toulemonde, and W. Keune

Appl. Phys. Lett. 74, 2378 (1999); http://dx.doi.org/10.1063/1.123857 (3 pages) | Cited 1 time

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The magnetic and structural transformations in Tb/Fe multilayers irradiated with high energy Pb ions have been studied by 57Fe conversion electron Mössbauer spectrometry. Compositionally modulated amorphous FeTb alloy regions are formed at the interfaces in the vicinity of the ion path, accompanied by a loss of the perpendicular magnetic anisotropy. A phenomenological model, proposed earlier, has been used to explain the evolution of the magnetic anisotropy. © 1999 American Institute of Physics.
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75.70.Cn Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
75.30.Gw Magnetic anisotropy
68.35.Fx Diffusion; interface formation
61.80.Jh Ion radiation effects
61.82.Bg Metals and alloys
64.75.-g Phase equilibria
76.80.+y Mössbauer effect; other γ-ray spectroscopy
68.65.-k Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties
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