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12 Oct 1998

Volume 73, Issue 15, pp. 2069-2222

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Spin-dependent conductance quantization in nickel point contacts

Hirotaka Oshima and Kenjiro Miyano

Appl. Phys. Lett. 73, 2203 (1998); http://dx.doi.org/10.1063/1.122423 (3 pages) | Cited 53 times

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We have observed systematic change of the quantized conductance in point contacts of macroscopic nickel wires under varying external parameters, the temperature (above and below Tc) and the applied magnetic field. The observed quantized conductance can be explained by the number of the channels for electronic transport through the point contact and the spin-dependent transmission coefficient. © 1998 American Institute of Physics.
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73.40.Jn Metal-to-metal contacts
75.50.Cc Other ferromagnetic metals and alloys
72.15.Eb Electrical and thermal conduction in crystalline metals and alloys

Probing interfacial and bulk magnetic hysteresis in roughened CoFe thin films

J. W. Freeland, K. Bussmann, P. Lubitz, Y. U. Idzerda, and C.-C. Kao

Appl. Phys. Lett. 73, 2206 (1998); http://dx.doi.org/10.1063/1.122424 (3 pages) | Cited 17 times

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The hysteretic behavior of interfacial magnetic moments for CoFe thin films with varying roughness is determined in an element specific manner by monitoring the applied magnetic field dependence of the specular and off-specular (diffuse) contributions to the x-ray resonant magnetic scattering signal. Increasing the interfacial roughness generates a larger variation of the relative coercive field associated with the interfacial moment in comparison to the bulk. © 1998 American Institute of Physics.
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75.70.Cn Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
75.50.Bb Fe and its alloys
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
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