Toward Versatile Sr2FeMoO6-Based Spintronics by Exploiting Nanoscale Defects

Minnamari Saloaro*, Martin Hoffmann, Waheed A. Adeagbo, Sari Granroth, Hakan Deniz, Heikki Palonen, Hannu Huhtinen, Sayani Majumdar, Pekka Laukkanen, Wolfram Hergert, Arthur Ernst, Petriina Paturi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

To actualize the high spintronic application potential of complex magnetic oxides, it is essential to fabricate these materials as thin films with the best possible magnetic and electrical properties. Sr2FeMoO6 is an outstanding candidate for such applications, but presently no thin film synthesis route, which would preserve the magnetic properties of bulk Sr2FeMoO6, is currently known. In order to address this problem, we present a comprehensive experimental and theoretical study where we link the magnetic and half metallic properties of Sr2FeMoO6 thin films to lattice strain, Fe - Mo antisite disorder and oxygen vacancies. We find the intrinsic effect of strain on the magnetic properties to be very small, but also that an increased strain will significantly stabilize the Sr2FeMoO6 lattice against the formation of antisite disorder and oxygen vacancies. These defects, on the other hand, are recognized to drastically influence the magnetism of Sr2FeMoO6 in a nonlinear manner. On the basis of the findings, we propose strain manipulation and reductive annealing as optimization pathways for improving the spintronic functionality of Sr2FeMoO6.

Original languageEnglish
Pages (from-to)20440-20447
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number31
DOIs
Publication statusPublished - 10 Aug 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • antisite disorder
  • first-principles
  • magnetic properties
  • nanoscale defects
  • oxygen vacancy
  • SFMO
  • spintronics
  • strain

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