Magnetic properties of tetragonal DyRu<sub>2</sub>Si<sub>2</sub>

Andreani, B; Fraga, G.L.F.; Garnier, A.; Gignoux, D.; Maurin, D.; Schmitt, D.; Shigeoka, T.

doi:10.1088/0953-8984/7/9/013

Cited by 21 publications

(14 citation statements)

References 10 publications

(2 reference statements)

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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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“…At 1.6 K, as well as 5 K, the magnitude of the moments is close to the saturated value 10 µ B . Magnetization measurements on a single crystal have shown a multistep metamagnetic behaviour typical of this class of compounds [6]. Besides, the field dependence of the moment configuration has been investigated by neutron diffraction on a single crystal [7]: at 4.2 K, the main field-induced magnetic structure (above ∼ 1 T) turns out to be a bidimensional (double-Q) antiphase structure.…”

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confidence: 99%

Anomalous low-temperature magnetic behaviour in DyRu ₂ Si ₂ and DyRu ₂ Ge ₂

et al. 1996

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The body-centred tetragonal compounds DyRu2Si2 and DyRu2Ge2 order within a collinear modulated magnetic structure at TN = 29 and 22 K, respectively. Below ∼ 5 K, both compounds present a low-field low-temperature magnetic state which exhibits several nonconventional features. The most spectacular one is a double-peak structure in the temperature dependence of the specific heat, associated with a giant variation of the magnetic entropy. Other anomalous characteristics include an unexpected change of behaviour in the magnetization processes and an unusual variation of the resistivity in this temperature range. The nature of this low-temperature phase is a puzzle.

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“…The sign of y P suggests that the dominant interaction along the [0 0 1] and [1 0 0] directions are ferromagnetic and antiferromagnetic, respectively. The difference between y P is not so large comparing to those of family compounds DyM 2 Si 2 (M=Co, Ru) [8,9].…”

Section: Resultsmentioning

confidence: 82%