skip to main content

Title: Magnetic properties and local microstructures in Zn-doped YMnO{sub 3}

The hole doping effect on the magnetic properties of multiferroic YMn{sub 1−x}Zn{sub x}O{sub 3} was studied through investigating the local microstructures. Polycrystalline YMn{sub 1−x}Zn{sub x}O{sub 3} samples with x ranging from 0 to 0.22 are synthesized by solid-state reaction method. The x-ray diffraction patterns reveal that YMn{sub 1−x}Zn{sub x}O{sub 3} samples with low Zn{sup 2+} doping concentration (x < 0.1) maintain single phase which show hexagonal structure with space group of P6{sub 3}cm. The temperature dependence of magnetization presents that the magnetic moment at low temperature and the FM transition temperature increase with increasing the doping concentration of Zn{sup 2+}. Meanwhile, ferromagnetism induced by Zn{sup 2+} doping is found to become stronger. EXAFS analysis reveals the in-plane Mn-O{sub P} bond length decreases while the out-of-plane Mn-O{sub A} bond length keeps almost constant. The weak FM order is ascribed to order-to-disorder effect resulting from the diluted exchange interaction among Mn{sup 3+} ions and double-exchange interaction between the mixed valence-state of Mn{sup 3+} and Mn{sup 4+} by hole doping of Zn{sup 2+}.
Authors:
 [1] ; ; ;  [2]
  1. College of Science, Hohai University, Nanjing 210098 (China)
  2. Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22273687
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; BOND LENGTHS; CONCENTRATION RATIO; DOPED MATERIALS; EXCHANGE INTERACTIONS; FERROMAGNETISM; HEXAGONAL LATTICES; HOLES; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANATES; MANGANESE IONS; MICROSTRUCTURE; POLYCRYSTALS; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; YTTRIUM COMPOUNDS; ZINC IONS