TY  - JOUR
AU  - Chatterji, T.
AU  - Ouladdiaf, B.
AU  - Hansen, T.C.
TI  - The magnetoelastic effect in CoF_2 investigated by means of neutron powder diffraction
JO  - Journal of physics / Condensed matter
VL  - 22
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-8823
SP  - 096001
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - 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).
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21389428
UR  - <Go to ISI:>//WOS:000274602700019
DO  - DOI:10.1088/0953-8984/22/9/096001
UR  - https://juser.fz-juelich.de/record/8823
ER  -