Published October 1, 2002 | Version v1
Journal article Metadata-only

Crystal structure and magnetic properties of hexagonal RMnO3 (R=Y, Lu, and Sc) and the effect of doping

Creators

  • 1. SORST, Japan Science and Technology Corporation, Saitama 332-0012 (Japan)
  • 2. Department of Advanced Materials Science, University of Tokyo, Tokyo 113-8656 (Japan)
  • 3. Department of Applied Chemistry, University of Tokyo, Tokyo 113-8656 (Japan)
  • 4. Department of Crystalline Materials Science, Nagoya University, Nagoya 464-8603 (Japan)
  • 5. CIRSE, Nagoya University, Nagoya 464-8601 (Japan)
  • 6. SPring-8 and Japan Synchrotron Radiation Research Institute (JASRI), Hyogo 679-5198 (Japan)
  • 7. Department of Applied Physics, Nagoya University, Nagoya 464-8603 (Japan)
  • 8. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)

Description

A ferroelectricity-magnetism-coexisting system, hexagonal RMnO3 (R=Y, Lu, and Sc), has been investigated by synchrotron x-ray and neutron powder diffraction measurements. It is found from x-ray diffraction measurements that the ferroelectric polarization originates from the tilting of MnO5 polyhedra and the buckling of R layers, which persists up to 1000 K. Neutron diffraction measurements have revealed the reduction of ordered moments from the expected value, as well as strong magnetic diffuse scattering existing far above TN, both of which are caused by geometrical frustration of the triangular lattice of Mn ions. We have also investigated the effects of Zr doping into the R site and have found that Zr doping drastically suppresses both ferroelectric distortion and magnetic ordering

Additional details

Identifiers

DOI
10.1103/PhysRevB.66.134434;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
66
Journal Issue
13
Journal Page Range
p. 134434-134434.8
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36001313
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
CRYSTAL DOPING; CRYSTAL STRUCTURE; DIFFUSE SCATTERING; FERROELECTRIC MATERIALS; LATTICE PARAMETERS; LAYERS; LUTETIUM COMPOUNDS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETISM; MAGNETIZATION; MANGANATES; MANGANESE IONS; NEUTRON DIFFRACTION; PHASE TRANSFORMATIONS; POLARIZATION; SCANDIUM COMPOUNDS; SYNCHROTRON RADIATION; X-RAY DIFFRACTION; YTTRIUM COMPOUNDS; ZIRCONIUM
Descriptors DEC
BREMSSTRAHLUNG; CHARGED PARTICLES; COHERENT SCATTERING; DIELECTRIC MATERIALS; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; IONS; MANGANESE COMPOUNDS; MATERIALS; METALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIATIONS; RARE EARTH COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Notes
(c) 2002 The American Physical Society