This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/22/31/316001 in citations.
Magnetoelastic effect in MF2 (M = Mn, Fe, Ni) investigated by neutron powder diffraction
Magnetoelastic effect in MF2 (M = Mn, Fe, Ni) investigated by neutron powder diffraction
We have investigated the magnetoelastic effects in MF(2) (M = Mn, Fe, Ni) associated with the antiferromagnetic phase transition temperature T(N) by neutron powder diffraction. The temperature variation of the lattice parameters and the unit cell volume has been determined accurately with small temp...
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Personal Name(s): | Chatterji, T. |
---|---|
Iles, G.N. / Ouladdiaf, B. / Hansen, T.C. | |
Contributing Institute: |
JCNS; JCNS Streumethoden; IFF-4 Neutronenstreuung; IFF-5 |
Published in: | Journal of physics / Condensed matter, 22 (2010) S. 316001 |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
316001 |
DOI: |
10.1088/0953-8984/22/31/316001 |
PubMed ID: |
21399371 |
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 MF(2) (M = Mn, Fe, Ni) associated with the antiferromagnetic phase transition temperature T(N) by 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 parameters a, c and V the lattice strains Δa, Δc and ΔV associated with the antiferromagnetic phase transition have been extracted. Rietveld refinement of the crystal and magnetic structures from the diffraction data at low temperature gave a magnetic moment of 5.12 ± 0.09 μ(B), 4.05 ± 0.05 μ(B) and 1.99 ± 0.05 μ(B) per Mn, Fe and Ni ions, respectively. The lattice strains Δa, Δc and ΔV couple linearly with the intensity of the 100 magnetic reflection, which is proportional to square of the order parameter of the antiferromagnetic phase transition. The volume strains in MF(2) (M = Mn, Fe, Co, Ni) due to the magnetostriction vary smoothly along the transition metal series and seem to be correlated with the strength of the exchange interaction and the moments of the magnetic ions. |