Controlling magnetic anisotropy in La_0.7Sr_0.3MnO₃ nanostructures

Wahler, M., Buttner, B., Blaschek, H.H., Homonnay, N., Wid, O., O'Shea, K.J., McGrouther, D. , MacLaren, D.A. and Schmidt, G. (2014) Controlling magnetic anisotropy in La_0.7Sr_0.3MnO₃ nanostructures. Applied Physics Letters, 104, 052408-1. (doi: 10.1063/1.4863978)

Abstract

We have developed a chlorine based dry etching process for nanopatterning the ferromagnetic oxide La_0.7Sr_0.3MnO₃ (LSMO). Large arrays of millions of identical structures have been fabricated from thin LSMO films by electron-beam lithography and reactive ion etching. SQUID magnetometry demonstrates that patterned nanostructures with lateral dimensions down to 100 nm retain their full magnetization and the Curie temperature of the bulk layer. In addition, their shape anisotropy is sufficient to overcome the crystalline anisotropy of the bulk. High resolution scanning transmission electron microscopy shows that crystallinity is preserved even at the edges of the nanostructures.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: MacLaren, Professor Donald and McGrouther, Dr Damien and O'Shea, Miss Kerry
• Authors: Wahler, M., Buttner, B., Blaschek, H.H., Homonnay, N., Wid, O., O'Shea, K.J., McGrouther, D., MacLaren, D.A., and Schmidt, G.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118
• Copyright Holders: Copyright © 2014 American Institute of Physics
• First Published: First published in Applied Physics Letters 104:052408
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher