期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 19, 页码 3256-3261出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.05.064
关键词
Rare earth intermetallics; Frustrated antiferromagnet; AF magnons; Neutron scattering
资金
- European Commission [RII3-CT-2003-505925(NMI3)]
- National Scientific Network
Physical properties of the compound TmAgGe have been investigated by means of magnetometric, transport, calorimetric as well as neutron diffraction measurements. The compound crystallizes in the hexagonal ZrNiAl-type crystal structure. The reported results indicate that the sample exhibits an antiferromagnetic ordering below T(N) = 4.2 K. The low temperature behavior of the magnetic susceptibility and the specific heat is in good agreement with the spin-wave theory with linear dispersion relation. In addition, the magnetic structure of TmAgGe was determined by means of neutron diffraction measurements. The Tm moments are equal to 6.44(10) mu(B) at 1.5 K and form a non-collinear magnetic structure within the basal plane. To describe this structure three different propagation vectors: (k) over right arrow = [1/2, 0, 0], (k) over right arrow' = [-1/2, 1/2, 0] and (k) over right arrow '' = [0, 1/2, 0] are required. Such a spin arrangement is analyzed on the basis of group theory. (C) 2009 Elsevier B.V. All rights reserved.
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