Electronic and Magnetic Structure of LaSr-2×4 Manganese Oxide Molecular Sieve Nanowires. (16th April 2014)

• Record Type: Journal Article
• Authors: Gazquez, Jaume; Carretero-Genevrier, Adrián; Gich, Martí; Mestres, Narcís; Varela, María
• Is Part Of: Microscopy and microanalysis. Volume 20:Number 3(2014:Jun.)
• Page Start: 760
• Page End: 766
• Publication Date: 2014-04-16
• Subjects: Microscopy -- Periodicals; Microchemistry -- Periodicals; 502.82
• DOI: 10.1017/S1431927614000592
• Languages: English
• ISSNs: 1431-9276

Abstract

<abstract abstract-type="normal"> <title>Abstract</title> <p>In this study we combine scanning transmission electron microscopy, electron energy loss spectroscopy and electron magnetic circular dichroism to get new insights into the electronic and magnetic structure of LaSr-2×4 manganese oxide molecular sieve nanowires integrated on a silicon substrate. These nanowires exhibit ferromagnetism with strongly enhanced Curie temperature (<italic>T</italic>_{<italic>c</italic>}&gt;500 K), and we show that the new crystallographic structure of these LaSr-2×4 nanowires involves spin orbital coupling and a mixed-valence Mn³⁺/Mn⁴⁺, which is a must for ferromagnetic ordering to appear, in line with the standard double exchange explanation.</p> </abstract>