Structural and magnetic properties of GeMn layers; High Curie temperature ferromagnetism induced by self organized GeMn nano-columns

✍ Scribed by Devillers, T. ;Jamet, M. ;Barski, A. ;Poydenot, V. ;Dujardin, R. ;Bayle Guillemaud, P. ;Rothman, J. ;Bellet Amalric, E. ;Cibert, J. ;Mattana, R. ;Tatarenko, S.

• Book ID: 105364104
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 319 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200673026

✦ Synopsis

Abstract

In this paper we report on the structural and magnetic properties of GeMn layers grown on Ge(001). We show that for the optimized Mn concentration (6%) and for optimized growth temperature (close to 130 °C), GeMn samples exhibit a high Curie temperature (higher than 400 K) and Anomalous Hall Effect up to room temperature. Our GeMn layers grown at low temperature (70 °C to 130 °C) are composed of vertical Mn‐rich nano‐colums. Samples grown at temperatures higher than 130 °C contain GeMn nanoclusters. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)