Dresden 2014 – wissenschaftliches Programm

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KR: Fachgruppe Kristallographie

KR 5: Multiferroics II (MA jointly with DF, DS, KR, TT)

KR 5.1: Vortrag

Mittwoch, 2. April 2014, 09:30–09:45, HSZ 04

An Engineered Polar Oxide Heterostructure Built from Isosymmetric Magnetically Ordered Components — •Matthew S Dyer¹, Jonathan Alaria¹, Pavel Borisov^1,5, Troy D Manning¹, Serban Lepadatu², Markys G Cain², Elena D Mishina³, Natalia E Sherstyuk³, N A Ilyin³, Joke Hadermann⁴, David Lederman⁵, John B Claridge¹, and Matthew J Rosseinsky¹ — ¹University of Liverpool, Liverpool, UK — ²National Physical Laboratory, Teddington, UK — ³Moscow State Technical University, Moscow, Russia — ⁴University of Antwerp, Antwerp, Belgium — ⁵West Virginia University, Morgantown, USA

Theory predicts that certain layered heterostructures consisting of perovskite blocks have non-centrosymmetric structures. The breaking of spatial inversion symmetry arises through a combination of octahedral tilting and A site ordering. Following this prediction, we grow a thin-film of the [(YFeO₃)₅(LaFeO₃)₅]₄₀ heterostructure using RHEED monitored pulsed layer deposition. Polar domains are present in the thin-film, as demonstrated by second harmonic generation and piezoelectric force microscopy measurements. We experimentally confirm that the heterostructure is also magnetically ordered at room temperature with a finite magnetization, retaining the magnetic structure of the individual YFeO₃ and LaFeO₃ components.