Volume 44, Number 3, November I 1998
|Page(s)||379 - 385|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Giant magnetoresistance in superlattices without bulk scattering
Research Institute for Materials, KU Nijmegen - 6525 ED Nijmegen, The Netherlands
2 Laboratorium voor Vaste-Stoffysika en Magnetisme, K.U. Leuven, 3001 Leuven, Belgium
3 Hamburger Synchrotronstrahlungslabor at DESY, Notkestr. 85, 22607 Hamburg, Germany
4 Instituut voor Kern- en Stralenfisika - K.U. Leuven, 3001 Leuven, Belgium
Accepted: 17 September 1998
The Giant Magnetoresistance (GMR) observed in magnetic multilayers is due to spin-dependent scattering of electrons at interfaces or bulk defects. In order to unambiguously separate these two possible contributions, we produced Fe/Cr superlattices with negligible bulk defects, thus providing only interface scattering. The vertical and lateral interface roughness parameters were quantitatively analysed using synchrotron X-ray diffraction and Conversion Electron Mößbauer Spectroscopy. The magnitude of the GMR effect depends on both the vertical roughness amplitude η and the step density nstep. We find a linear increase of the Giant Magnetoresistance with .
PACS: 75.70.Pa – Giant magnetoresistance / 68.35.Ct – Interface structure and roughness / 61.10.-i – X-ray diffraction and scattering
© EDP Sciences, 1998
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