Chemical Strain Engineering of Magnetism in Oxide Thin Films

• DOI: 10.1002/adma.201604112
• Publication Date: 2017-04-05T11:32:26Z
• Authors: Olivier Copie; Julien Varignon; Hélène Rotella; Gwladys Steciuk; Philippe Boullay; Alain Pautrat; Adrian David; Bernard Mercey; Philippe Ghosez; Wilfrid Prellier
• Keywords: Magnetism; Strain engineering; Strain (injury)

Transition metal oxides having a perovskite structure form wide and technologically important class of compounds. In these systems, ferroelectric, ferromagnetic, ferroelastic, or even orbital charge orderings can develop eventually coexist. These be tuned by external electric, magnetic, stress field, the cross-couplings between them enable multifunctional properties, such as piezoelectricity, magneto-electricity, magneto-elasticity. Recently, it has been proposed that additional to typical fields, chemical potential controls concentration ion vacancies in systems may reveal an efficient alternative parameter further tune their properties achieve new functionalities. this study, concretizing proposal, authors show control content oxygen thin films indeed used magnetic properties. Growing PrVO3 epitaxially on SrTiO3 substrate, concrete pathway effect. The demonstrate monitoring through partial pressure growth temperature produce substantial macroscopic tensile strain few percent. turn, affects exchange interactions, producing nontrivial evolution Néel range 30 K.