Twinned-domain-induced magnonic modes in epitaxial LSMO/STO films

• Published in: New journal of physics Vol. 19; no. 6; pp. 63002 - 63009
• Main Authors: Wahlström, Erik, Macià, Ferran, Boschker, Jos E, Monsen, Åsmund, Nordblad, Per, Mathieu, Roland, Kent, Andrew D, Tybell, Thomas
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01-06-2017
• Subjects: Crystal growth; epitaxial LSMO/STO films; epitaxialLSMO/STO films; FMR; Frequency ranges; Magnetic properties; magnonics; Material properties; Perovskites; Physics; twin domains
• ISSN: 1367-2630; 1367-2630
• DOI: 10.1088/1367-2630/aa70af

The use of periodic magnetic structures to control the magneto-dynamic properties of materials-magnonics-is a rapidly developing field. In the last decade, a number of studies have shown that metallic films can be patterned or combined in patterns that give rise to well-defined magnetization modes, which are formed due to band folding or band gap effects. To explore and utilize these effects in a wide frequency range, it is necessary to pattern samples at the sub-micrometer scale. However, it is still a major challenge to produce low-loss magnonic structures with periodicities at such length scales. Here, we show that for a prototypical perovskite, La 0.7 Sr 0.3 MnO3, the twinned structural order can be used to induce a magnetic modulation with a period smaller than 100 nm, demonstrating a bottom-up approach for magnonic crystal growth.