Structurally induced magnetization in a La 2/3Sr 4/3MnO 4 superlattice

Amish B. Shah, Brittany B. Nelson-Cheeseman, Ganesh Subramanian, Anand Bhattacharya, John Spence

Research output: Contribution to journalArticlepeer-review

Abstract

A structural transition has been observed in a digital superlattice of La 2/3Sr 4/3MnO 4, which is correlated to a magnetization enhancement upon cooling the sample. These artificial superlattices were grown layer-by-layer using ozone-assisted molecular beam epitaxy (MBE). Electron diffraction experiments show a phase transition below 150 K in nanopatches of the superlattice, which coincides with an enhanced magnetization starting below 110 K. Atomic scale electron energy loss spectroscopy (EELS) also shows changes in the Mn L 2,3 and O K edges, which are related to valence, strain, and the atomic coordination within nanopatches. Atomic resolution image and EELS showing variations of oxygen and lanthanum signature edges in a La 2/3Sr 4/3MnO 4 supperlattice.

Original languageEnglish (US)
Pages (from-to)1322-1327
Number of pages6
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume209
Issue number7
DOIs
StatePublished - Jul 2012

Keywords

  • EELS
  • Ruddleson-Popper
  • magnetic phase transitions
  • oxide superlattices

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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