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Title: Exchange bias and magnetic properties induced by intrinsic structural distortion in CaMn{sub 3}O{sub 6} nanoribbons

Single-crystalline CaMn{sub 3}O{sub 6} nanoribbons have been synthesized by a molten-salt method. To explore the origin of the magnetism of nanosized antiferromagnetic (AFM) manganites, a comparative study has been conducted for CaMn{sub 3}O{sub 6} (CMO-1) and post-growth vacuum annealed (CMO-2) nanoribbons. A lattice expansion resulting from oxygen release during vacuum annealing is observed. Correspondingly, AFM ordering in CMO-2 is further suppressed, and ferromagnetism and spin-glass (SG)-like behavior are significantly enhanced, which are presumed attributable to the intrinsic structural distortions induced by oxygen vacancies. In this case, side and surface effects are not decisive factors. In addition, this study provided observations of the exchange bias effect in manganite nanoribbons with an AFM-SG-like-ferromagnetic (FM) structure, as compared with the typical AFM-core-FM-shell.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Department of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601 (China)
  2. School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601 (China)
Publication Date:
OSTI Identifier:
22275803
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; ANTIFERROMAGNETISM; CURIUM OXIDES; FERROMAGNETISM; MAGNETIC PROPERTIES; MOLTEN SALTS; MONOCRYSTALS; NANOSTRUCTURES; OXYGEN; SPIN GLASS STATE; VACANCIES