DPG Phi
Verhandlungen
Verhandlungen
DPG

Münster 1999 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

AM: Magnetismus

AM 10: Postersitzung

AM 10.48: Poster

Tuesday, March 23, 1999, 16:15–20:00, F\"urstenberghaus

Step-Edge Magnetoresistance in La0.7Ca0.3MnO3 Films — •M. Ziese1, G. Heydon2, R. Höhne3, P. Esquinazi3, and J. Dienelt41Dept. of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom — 2Dept. of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom — 3Abt. Supraleitung und Magnetismus, Universität Leipzig, 04103 Leipzig — 4Institute for Surface Modification, 04318 Leipzig

As a first step towards easily fabricated magnetoresistance devices in planar technology, we have fabricated step edge structures in 25 nm thick La0.7Ca0.3MnO3 films deposited on LaAlO3 substrates. Step-edge arrays with 150 to 200 steps of height 100–200 nm and 20 µm step separation along [100] and [110] were fabricated by chemically assited ion-beam etching. The low-field magnetoresistance of the structures is large reaching 20% in a magnetic field of 0.1 T at 77 K. The dynamic conductivity indicates a spin-polarized tunneling mechanism with a spin-glass like interface.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1999 > Münster