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000008823 084__ $$2WoS$$aPhysics, Condensed Matter
000008823 1001_ $$0P:(DE-Juel1)VDB34442$$aChatterji, T.$$b0$$uFZJ
000008823 245__ $$aThe magnetoelastic effect in CoF_2 investigated by means of neutron powder diffraction
000008823 260__ $$aBristol$$bIOP Publ.$$c2010
000008823 300__ $$a096001
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000008823 440_0 $$03703$$aJournal of Physics: Condensed Matter$$v22$$x0953-8984
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000008823 520__ $$aWe 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).
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000008823 7001_ $$0P:(DE-HGF)0$$aOuladdiaf, B.$$b1
000008823 7001_ $$0P:(DE-HGF)0$$aHansen, T.C.$$b2
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000008823 8567_ $$uhttp://dx.doi.org/10.1088/0953-8984/22/9/096001
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