Low-temperature two-dimensional order-disorder magnetic transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TbRu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Si</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mr

Silva, M. A. Salgueiro da; Sousa, J.B.; Chevalier, Bernard; Étourneau, J.; Gmelin, E.; Schnelle, Walter

doi:10.1103/physrevb.52.12849

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…This is in contradiction with the interpretation proposed for the heatcapacity anomaly at T t in TbRu 2 Si 2 that considered that the low-field antiferromagnetic structure has become a mixed phase with one out of the thirteen Tb planes paramagnetic, whereas the others have the same maximum value. 13 DyRu 2 Si 2 and DyRu 2 Ge 2 exhibit magnetic phase diagrams rather similar to those of the Tb-based compounds, 14,15 and the possibility of mixed phases has been invoked. 16 This is rather surprising for a Kramer's ion in which singlet CEF levels cannot exist.…”

Section: Numerical Simulations and Discussionmentioning

confidence: 99%

Evidence of mixed magnetic phases inTbRu2Ge2

et al. 1998

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In compounds with normal rare earths at the same crystallographic site, mixed magnetic phases with two distinct rare-earth magnetic states, namely, a zero moment one and another with a high moment, can be stabilized at low temperature not only in zero applied field but also in different field-induced magnetic phases of a metamagnetic process. These characteristics are observed in tetragonal TbRu 2 Ge 2 from neutron diffraction and magnetization measurements on a single crystal. It is shown that such magnetic structures may originate from a moment instability due to the crystal field in the presence of frustrated exchange interactions. Numerical simulations using the periodic-field model allowed us to satisfactorily account for the observed properties and emphasize the crucial role played by the crystal field. ͓S0163-1829͑98͒00209-4͔

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Section: Numerical Simulations and Discussionmentioning

confidence: 99%

Evidence of mixed magnetic phases inTbRu2Ge2

et al. 1998

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“…This transition at 3.1 K is evidenced by specific heat measurements because it produces a slight decrease in the curve C p /T = f (T ) [6]. This decrease is the sign of the sinusoidal squaring up process which has already been observed for instance in TbRu 2 Si 2 and TbNi 2 Si 2 [21,22]. The magnetic structures of CeRuSiH are very different from the non-hydrogenated magnetic REMX (RE = Rare Earth) compounds crystallizing in the tetragonal CeFeSi-type structure (M = Fe, Co or Ru, X = Si or Ge).…”

Section: Magnetic Structurementioning

confidence: 57%

Modulated magnetic structures of the antiferromagnetic hydride CeRuSiH

Tencé

André

Gaudin

et al. 2008

J. Phys.: Condens. Matter

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The hydride CeRuSiH is derived from the non-magnetic heavy-fermion ternary silicide CeRuSi that crystallizes in the tetragonal CeFeSi-type structure (P4/nmm space group). This hydride exhibits two antiferromagnetic transitions at T N1 = 7.5(2) K and T N2 = 3.1(2) K, evidenced by magnetization and specific heat measurements. Crystal and magnetic structures of CeRuSiH have thus been investigated by means of neutron powder diffraction, which has shown firstly that H-atoms are fully inserted in the [Ce 4 ]-tetrahedra. Moreover, between T N1 and T N2 , the Ce magnetic moments are ordered in a collinear antiferromagnetic sinusoidal structure associated with the propagation vector k = (k x , k x , 1/2) (k x < 1/3 and tends to 1/3 with decreasing temperature). At T N2 , the magnetic structure becomes square wave modulated and commensurate with k = (1/3, 1/3, 1/2) as propagation vector. At 1.5 K, the structure is antiphase with a Ce magnetic moment of 1.68(2) μ B . These magnetic structures are compared with those previously reported on the substituted ternary silicides (Ce 1−x La x )Ru 2 Si 2 and CeRu 2 (Si 1−x Ge x ) 2 , which also present an antiferromagnetic behaviour.

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“…These long-period modulations are one-dimensional along the a-axis. This has caused controversy as to which is the real structure, with Q ¼ ð3=13 0 0Þ; 04 % 440 % 44 % 4 or 5 % 44 % 54 % 4 for TbRu 2 Si 2 [8,9]. Similarly for TbRu 2 Ge 2 and DyRu 2 Si 2 , which is real, 5 [11,12], respectively, is controversial.…”

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confidence: 94%

“…Only rare-earth ions bear the magnetic moments, which are parallel or anti-parallel to the c-axis in the ordered states due to large crystalline anisotropy, and are simply arranged in the body-centred tetragonal symmetry, so that they form (2 0 0)/(1 0 0) ferromagnetic sheets with a=2 spacing between consecutive sheets along the a-axis. By neutron [1][2][3], magnetization [4][5][6] and specific heat [7,8] studies, a long-period magnetic modulation with Q ¼ ðt 0 0Þ; and successive transitions at T N ; T t and T 0 t have been reported. Since t are 0.231, 0.235 and 0.222 for TbRu 2 Si 2 , TbRu 2 Ge 2 and DyRu 2 Si 2 , which are close to the ratios 3/13, 4/17 and 2/9, respectively, the modulations can be considered commensurate.…”

mentioning

confidence: 99%