This title appears in the Scientific Report :
2000
Structure and magnetism of Ho0.2Ca0.8MnO3
Structure and magnetism of Ho0.2Ca0.8MnO3
We studied polycrystalline Ho0.2Ca0.8MnO3 by neutron and X-ray diffraction. At room temperature Ho0.2Ca0.8MnO3 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(I)K neutron...
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Personal Name(s): | Zeiske, T. |
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Hagdorn, K. / Hohlwein, D. / Ihringer, J. / Prandl, W. / Ritter, H. | |
Contributing Institute: |
Institut für Festkörperforschung; IFF |
Published in: | Physica / B, 276/278 (2000) S. 624 - 625 |
Imprint: |
Amsterdam
North-Holland Physics Publ.
2000
|
Physical Description: |
624 - 625 |
Document Type: |
Journal Article |
Research Program: |
Methodenentwicklung für Synchrotron- und Neutronenstrahlung |
Series Title: |
Physica B: Condensed Matter
276/278 |
Subject (ZB): | |
Publikationsportal JuSER |
We studied polycrystalline Ho0.2Ca0.8MnO3 by neutron and X-ray diffraction. At room temperature Ho0.2Ca0.8MnO3 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(I)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 (2a(mag) - c(mag))-direction. The size of the ordered moment is proportional to the monoclinic lattice distortion. (C) 2000 Elsevier Science B.V. All rights reserved. |