TY - JOUR

T1 - Fractal structure and critical scattering in the three-dimensional percolating antiferromagnet, RbMn0.31 Mg0.69 F3

AU - Itoh, S.

AU - Kajimoto, R.

AU - Iwasa, K.

AU - Aso, N.

AU - Bull, M. J.

AU - Adams, M. A.

AU - Takeuchi, T.

AU - Yoshizawa, H.

N1 - Funding Information:
The pulsed neutron scattering experiments were performed under the Japan-UK Collaboration Programme on Neutron Scattering. This work was supported by a Grant-in-Aid for Creative Scientific Research (no.16GS0417) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2006/11/27

Y1 - 2006/11/27

N2 - We have performed neutron scattering experiments to investigate the static magnetic structure and the magnetic critical scattering in the three-dimensional percolating Heisenberg antiferromagnet, RbMn0.31 Mg0.69 F3, whose magnetic concentration is just at the percolation concentration for a cubic lattice, cP = 0.312. Magnetic scattering was observed around the superlattice point, (frac(1, 2), frac(1, 2), frac(1, 2)). We determined the Néel temperature of this system to be TN = 4.0 ± 0.5 K, and found that the critical scattering above TN is similar to that observed in the homogeneous system. At T = 1.6 K well below TN, the scattering function is described by a sum of the critical scattering and elastic scattering components, and we demonstrated that the q-variation of the intensity of the elastic scattering component can be described using the fractal dimension.

AB - We have performed neutron scattering experiments to investigate the static magnetic structure and the magnetic critical scattering in the three-dimensional percolating Heisenberg antiferromagnet, RbMn0.31 Mg0.69 F3, whose magnetic concentration is just at the percolation concentration for a cubic lattice, cP = 0.312. Magnetic scattering was observed around the superlattice point, (frac(1, 2), frac(1, 2), frac(1, 2)). We determined the Néel temperature of this system to be TN = 4.0 ± 0.5 K, and found that the critical scattering above TN is similar to that observed in the homogeneous system. At T = 1.6 K well below TN, the scattering function is described by a sum of the critical scattering and elastic scattering components, and we demonstrated that the q-variation of the intensity of the elastic scattering component can be described using the fractal dimension.

KW - Fractal

KW - Magnetic phase transition

KW - Neutron scattering

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U2 - 10.1016/j.physb.2006.05.146

DO - 10.1016/j.physb.2006.05.146

M3 - Article

AN - SCOPUS:33751319728

VL - 385-386 I

SP - 441

EP - 443

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

ER -