Antiferromagnetic and ferromagnetic phases of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si5.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>UCu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Si</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>

Matsuda, Tatsuma D.; Haga, Yoshinori; Ikeda, Shugo; Galaţanu, A.; Ōnuki, Yoshichika

doi:10.1016/j.physb.2005.01.289

Cited by 3 publications

(9 citation statements)

References 5 publications

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“…It is quite clear that in such situations it is essential to use single-crystal samples in the measurements. In order to shed some light on this controversy we, in this paper, will present our magnetic data obtained on single-crystal samples of the silicide, and compare these data with those recently published by Fisk et al [4] and Matsuda et al [5]. Their results were also based on singlecrystalline materials grown by using either the Cu-or Sn-flux methods, respectively.…”

Section: Introductionmentioning

confidence: 71%

“…Paper study in their reply [6] to the review of Kuznietz [3] corroborated that their Cu-flux-grown crystals showing the low temperature anti-ferromagnetic transition are not identical to the polycrystals previously studied. Very recently, Matsuda et al [5] have presented their magnetic data obtained on the Sn-fluxgrown single crystals. These authors have demonstrated only the ferromagnetic properties below T C = 100 K. At the same time both these studies give evidence of an anomaly appearing several degrees above T C .…”

Section: Originalmentioning

confidence: 99%

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Magnetic properties of Cu‐flux‐grown UCu₂Si₂ single crystals

Troć

Bukowski

2005

Physica Status Solidi (b)

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PACS 75.30. Kz, 75.60.Ej In order to solve a serious problem of understanding the magnetic properties of UCu 2 Si 2 , we have grown single crystals of this compound from Cu-flux. Here we focus primarily on the magnetic behavior of this compound. In contrast to some previous polycrystalline and single-crystalline reports on UCu 2 Si 2 no signs of the transition into antiferromagnetic behavior have been observed below T C = 104(1) K. The magnetic properties of this compound are highly anisotropic, with an easy axis of magnetization along the [001] direction. The saturation moment has been determined at 4.2 K to be 1.55µ B . In the paramagnetic region the effective moments for the easy and hard directions are both about 3.0µ B . An extensive discussion of the obtained data, compared to those recently published by Fisk et al. and Matsuda et al., also based on single crystalline materials, has been presented. No an antiferromagnetic phase above T C has been detected.

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Section: Introductionmentioning

confidence: 71%

Section: Originalmentioning

confidence: 99%

Magnetic properties of Cu‐flux‐grown UCu₂Si₂ single crystals

Troć

Bukowski

2005

Physica Status Solidi (b)

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“…The ordered moments found from the magnetization at 2 and 1.9 K are respectively 1.55 [4] and 1.8 µ B /U at. [2,3]. Furthermore, there exists a dierence in the results of these two measurements concerning the appearance of the above tiny anomaly.…”

Section: Introductionmentioning

confidence: 96%

“…[1] indicated also a tiny anomaly just above T C connected with another magnetic phase transition. The performed recent magnetic studies on single-crystalline samples of this ternary compound have either revealed [2,3] or not [4] the existence of the above anomaly at 106 K. Nevertheless, both these measurements of the magnetization show a similarly large anisotropy in the FM state with a magnetic easy-axis of [001] and a hard-axis of [100] below T C = 100(1) K [2] or 104(1) K [3]. The ordered moments found from the magnetization at 2 and 1.9 K are respectively 1.55 [4] and 1.8 µ B /U at.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, there exists a dierence in the results of these two measurements concerning the appearance of the above tiny anomaly. Matsuda et al [2,3] measured the eld dependence of the magnetization in the temperature range 100106 K and found a clear metamagnetic transition already in applied elds of an order of 0.1 T, indicating an evidence of antiferromagnetic (AFM) ordering above T C . Then, a full conrmation of this fact came * corresponding author; e-mail: R.Troc@int.pan.wroc.pl from very detailed neutron diraction measurements of Honda et al [5], so that UCu 2 Si 2 transforms above T C into a long-period, amplitude-modulated antiferromagnet having a spin-density-wave (SDW)-like order vanishing at T N = 106 K. No such magnetic phase has been detected in the single-crystalline magnetization studies of Ref.…”

Section: Introductionmentioning

confidence: 99%

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Kondo Screening Effect and Ferromagnetic Order in UCu₂Si₂

2012

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Electrical resistivity and low temperature magnetoresistivity measurements made on a single crystal of UCu2Si2 are reported. By using as a phonon reference the temperature dependence of the electrical resistivity of ThCu2Si2 we could establish that UCu2Si2 has both a ferromagnetic and a Kondo behaviour. Such a phenomenon can be described by the underscreened Kondo lattice model. The magnetoresistivity revealed the presence of magnetic uctuations within the ferromagnetic order as it was reported previously for UGe2. Also one of the calculated Fermi surface sheets exhibits nesting properties, being in perfect agreement with the previous neutron diraction data, supporting the possibility of a presence of the spin density wave phase. In this ternary silicide, where the strong ferromagnetic behaviour exists, this phase is signalised by magnetic uctuations.

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