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Magnetic and Magnetotransport Properties οf Magnetite/Co-Ferrite/Magnetite Trilayers

100%

Chen Y., Ziese M.

Acta Physica Polonica A

2009

vol. 115

issue 1

284-286

The magnetic and magnetotransport properties of Fe_3O_4/CoFe_2O_4/Fe_3O_4 trilayers were investigated. The magnetization measurements indicate significant Co diffusion into the bottom magnetite layer. At lower temperatures the magnetoresistance measurements show two clearly separated maxima due to contributions from magnetically hard and soft layers. A tunneling effect was not observed. Comparison of full and minor resistance hysteresis loops did not reveal any significant exchange coupling between the layers, presumably due to diffuse interfaces.

Magnetism in Carbon: Writing Magnetic Structures with a Proton Micro-Beam on Graphite Surfaces

71%

Schindler K., Spemann D., Ziese M., Esquinazi P., Butz T.

Acta Physica Polonica A

2006

vol. 109

issue 3

249-255

Recent publications demonstrated the generation of magnetic order at room temperature on graphite surfaces after irradiation with protons. In this contribution we show that it is possible to produce magnetic structures in the micrometer range using a proton micro-beam by proton irradiation of the surface of highly oriented pyrolytic graphite samples. The experimental results are compared with micromagnetic simulations.

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2 Acta Physica Polonica A

1 2009

1 2006

2 Ziese M.

1 Butz T.

1 Chen Y.

1 Esquinazi P.

1 Schindler K.

1 Spemann D.

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Magnetic and Magnetotransport Properties οf Magnetite/Co-Ferrite/Magnetite Trilayers

Magnetism in Carbon: Writing Magnetic Structures with a Proton Micro-Beam on Graphite Surfaces