This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/22/9/096001 in citations.
The magnetoelastic effect in CoF_2 investigated by means of neutron powder diffraction
The magnetoelastic effect in CoF_2 investigated by means of neutron powder diffraction
We have investigated the magnetoelastic effects in CoF(2) associated with the antiferromagnetic phase transition temperature T(N)≈39 K by means of neutron powder diffraction. The temperature variation of the lattice parameters and the unit cell volume has been determined accurately with small temper...
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Personal Name(s): | Chatterji, T. |
---|---|
Ouladdiaf, B. / Hansen, T.C. | |
Contributing Institute: |
JCNS; JCNS Neutronenstreuung; ICS-1 Streumethoden; PGI-4 |
Published in: | Journal of physics / Condensed matter, 22 (2010) S. 096001 |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
096001 |
DOI: |
10.1088/0953-8984/22/9/096001 |
PubMed ID: |
21389428 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Journal of Physics: Condensed Matter
22 |
Subject (ZB): | |
Publikationsportal JuSER |
We have investigated the magnetoelastic effects in CoF(2) associated with the antiferromagnetic phase transition temperature T(N)≈39 K by means of neutron powder diffraction. The temperature variation of the lattice parameters and the unit cell volume has been determined accurately with small temperature steps. From the temperature variation of the lattice parameter c we extracted the lattice strain Δc associated with the antiferromagnetic phase transition. Rietveld refinement of the crystal and magnetic structure from the diffraction data at 2.2 K gave a magnetic moment of 2.57 ± 0.02 μ(B) per Co ion. We determined the temperature variation of the intensity of the 100 magnetic Bragg reflection, which is proportional to the square of the order parameter of the phase transition. We established that the lattice strain Δc couples linearly with the square of the order parameter of the antiferromagnetic phase transition in CoF(2). |