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Structurally induced magnetization in a La2/3Sr4/3MnO4 superlattice

Journal Article · · Physica Status Solidi. A, Applications and Materials Science
 [1];  [2];  [3];  [2];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Arizona State University Physics
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Arizona State Univ., Tempe, AZ (United States)
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A structural transition has been observed in a digital superlattice of La2/3Sr4/3MnO4, which is correlated to a magnetization enhancement upon cooling the sample. The artificial superlattices were grown layer-by-layer using ozone-assisted molecular beam epitaxy (MBE). Electron diffraction experiments show a phase transition below 150K in nanopatches of the superlattice, which coincides with an enhanced magnetization starting below 110K. Furthermore, atomic scale electron energy loss spectroscopy (EELS) shows changes in the Mn L2,3 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 La2/3Sr4/3MnO4 supperlattice.
Research Organization:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
DOE Contract Number:
FG03-02ER45996
OSTI ID:
1158814
Report Number(s):
DOE-ASU--45996
Journal Information:
Physica Status Solidi. A, Applications and Materials Science, Journal Name: Physica Status Solidi. A, Applications and Materials Science Journal Issue: 7 Vol. 209; ISSN 1862-6319
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
EELS
Ruddleson-Popper
magnetic phase transitions
oxide superlattices