Affordable Access

Publisher Website

Structure and magnetism of Ho0.2Ca0.8MnO3

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4526(99)01765-2
Keywords
  • Magnetoresistance
  • Antiferromagnetism
  • Powder Diffraction
Disciplines
  • Physics

Abstract

Abstract We studied polycrystalline Ho 0.2Ca 0.8MnO 3 by neutron and X-ray diffraction. At room temperature Ho 0.2Ca 0.8MnO 3 crystallizes in a distorted orthorhombic perovskite-like structure. At T C =160(1) K we observed a structural phase transition from space group Pnma to P2 1/m. Below T N =146(1)K neutron diffractograms show sharp magnetic peaks which are due to a long-range antiferromagnetic order of the magnetic moments of the Mn-ions. We describe this magnetic order in a magnetic unit cell with lattice vectors: a mag = a chem , b mag = b chem , c mag = a chem + c chem , magnetic spacegroup P 2a(mag) 2 1 /m. The magnetic moments of the Mn-ions are alligned in (2 a mag − c mag ) -direction. The size of the ordered moment is proportional to the monoclinic lattice distortion.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Catalytic Oxidation of NO over La0.8Sr0.2MnO3Perov...

on Chemical Research in Chinese U... Jan 01, 2008

Improved high temperature performance of La0.8Sr0....

on Journal of Power Sources Jan 01, 2011

Magnetic and transport properties of Pr0.8Ca0.2MnO...

on Journal of Magnetism and Magne... Jan 01, 2004
More articles like this..