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Title: Controlling magnetic anisotropy in La{sub 0.7}Sr{sub 0.3}MnO{sub 3} nanostructures

We have developed a chlorine based dry etching process for nanopatterning the ferromagnetic oxide La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (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.
Authors:
; ; ; ;  [1] ; ; ;  [2] ;  [1] ;  [3]
  1. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Germany)
  2. SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom)
  3. (Germany)
Publication Date:
OSTI Identifier:
22283302
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANISOTROPY; CHLORINE; CURIE POINT; ELECTRON BEAMS; ETCHING; FERROMAGNETIC MATERIALS; LANTHANUM COMPOUNDS; LAYERS; MAGNETIZATION; MANGANATES; MASKING; NANOSTRUCTURES; SQUID DEVICES; STRONTIUM COMPOUNDS; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY