Magnetic structure of UTGe (T: Ni, Pd, Pt) single crystals

Kawamata, Shuichi; Ishimoto, K.; Yamaguchi, Yasuo; Komatsubara, T.

doi:10.1016/0304-8853(92)90699-o

Cited by 38 publications

(21 citation statements)

References 2 publications

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“…It was reported to order antiferromagnetically around 42 K [1][2][3][4]. Neutron-diffraction results indicate the 5 f moments to be located in the b-c plane (in the TiNiSi notation) [1,4]. This finding is supported by the relatively weak magnetic response for magnetic fields applied along the a axis.…”

Section: Introductionsupporting

confidence: 72%

“…Low-field measurements in the SQUID magnetometer reveal this transition to disappear at 41.7 K, which is consistent with the magnetic phase transition reported in Refs. [1][2][3][4][5][6]. Between this temperature and 50 K, another weak transition evolves around 1 T, which may indicate the phase boundary of the incommensurate phase proposed in Ref.…”

Section: Metamagnetie Transitionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Metamagnetic transitions and giant magnetoresistance in UNiGe

Boer¹,

Prokeš²,

Nakotte³

et al. 1994

Physica B: Condensed Matter

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractWe report on the temperature dependence of the metamagnetic transitions, which occur in UNiGe in magnetic fields applied along the b and c axis. Above the ordering temperature TN = 50 K, a strong magnetic and thermal history-dependence is found. Furthermore, the development of a small ferromagnetic component (0.02/~B/f.u.) at 4.2 K after releasing the field applied indicates magnetic-history effects also at low temperatures. The presumed irreversibility in the magnetization process at low temperatures is corroborated by irreproducible changes in the magnetoresistance response at 4.2 K. Nevertheless, tentative magnetic phase diagrams have been Obtained for both orientations.

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Section: Introductionsupporting

confidence: 72%

Section: Metamagnetie Transitionsmentioning

confidence: 99%

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Metamagnetic transitions and giant magnetoresistance in UNiGe

Boer¹,

Prokeš²,

Nakotte³

et al. 1994

Physica B: Condensed Matter

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“…[1][2][3] In this structure, the uranium ions form chains along the a axis, albeit with small alternating displacements in the z direction, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 97%

Commensurate and incommensurate magnetic structures of UNiGe

et al. 1996

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. A single crystal of the orthorhombic intermetallic compound UNiGe has been studied at both steady-state and pulsed neutron sources in its commensurate ͑TϽ41.5 K͒ and incommensurate ͑41.5ϽTϽ51 K͒ magnetic phases. The ordering wave vector in both phases is qϭ͑0,␦,␦͒, with ␦ϭ1/2 in the commensurate phase. ␦ is temperature dependent in the incommensurate phase, increasing from 0.35 at 50 K to 0.37 at 44 K. Irreducible representation theory is used to discuss the possible moment configurations in real space, and least-squares refinement gives a moment of 0.36 B at 46 K, compared with 0.96 B at 20 K. While symmetry allows moment components along all three Cartesian directions, previous unpolarized-neutron-diffraction data had been analyzed in terms of a collinear arrangement of moments in the b-c plane. Polarized neutron diffraction in the low-temperature commensurate phase shows that it is noncollinear, with an additional x component to the uranium moment, and there is some evidence that this is also the case in the incommensurate phase. The polarized-neutron measurement gives a canting angle, with respect to the b-c plane, of 17Ϯ4°. The observed x components are discussed in terms of bonding of the 5 f -electron orbitals with the surrounding ligands.

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“…While the original neutron diffraction studies [8] have claimed that the low-temperature F state is collinear lying with moments within the b-c plane and arbitrary angle with respect to main axes, later studies [9] have shown that the magnetic structure is F with moments of 1.5µ B oriented along the b-axis. No a-axis component has been found although the high-field magnetization shows a non-negligible zero-field intercept value for this orientation.…”

Section: Resultsmentioning

confidence: 99%

Uranium Intermetallics in High Magnetic Fields: Neutron Diffraction Experiments

Prokeš

2008

Acta Phys. Pol. A

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The neutron diffraction is an indispensable technique for the determination of magnetic structures. Due to a rather large penetration depth of neutrons in many materials one can construct complicated sample environments necessary to prepare the desired magnetic phase of the material under study. Combination of magnetic fields, low temperatures, and high hydrostatic or uniaxial pressures are possible. Capabilities of this technique are demonstrated on a few experimental results obtained on uranium UTX (T: transition metal, X: p-element) compounds.

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Magnetic structure of UTGe (T: Ni, Pd, Pt) single crystals

Cited by 38 publications

References 2 publications

Metamagnetic transitions and giant magnetoresistance in UNiGe

Metamagnetic transitions and giant magnetoresistance in UNiGe

Commensurate and incommensurate magnetic structures of UNiGe

Uranium Intermetallics in High Magnetic Fields: Neutron Diffraction Experiments

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