Der Valenzzustand von Nickel, Zinn und Schwefel im ternären Chalkogenid Ni3Sn2S2 – XPS-,61Ni- und119Sn-Mößbauer-Untersuchungen und Bandstrukturrechnungen

Parallel angeordnete Spins in Cobalt-Kagome-Netzen lassen Forscher gleich mehrfachj ubeln:L iu et al. und Wang et al. berichtenv on Entdeckungen einmaliger Eigenschaftskombinationen:S n 2 Co 3 S 2 = Co 3 Sn 2 S 2 = SnCo 3/2 Sw eist riesige anomale Hall-Effekte auf,d ie bisher bekannte Materialien um Grçßenordnungen übertreffen. Fürd ie einstige Laborkuriositätwird dies auf eine elektronische Topologie des 2001 vorhergesagten magnetischen S = 1 = 2 -Grundzustands zurückgeführt, die es zu einem herausragenden Beispiel eines magnetischen Weyl-Halbmetalls macht. Wirg eben einen chemischen Blick auf diese lange Zeit wenig verstandene Verbindung,d ie auchi mH inblick auf Skyrmionen-Gitter und als Thermoelektrikum erforscht wird.

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Von der Laborpresse zu Spins mit riesigen Effekten

Weihrich

Pöttgen

Pielnhofer

2018

Angewandte Chemie

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From Laboratory Press to Spins with Giant Effects

2018

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chalcogenides ·e lectronic structure · Kagome structure ·magnetic structure ·semimetal · shandite Abstract: Parallelly aligned spins in Co-Kagome nets have provided several reasons for researchers to celebrate:Liu et al. and Wang et al. have reported discoveries of unique combinations of properties:S n 2 Co 3 S 2 = Co 3 Sn 2 S 2 = SnCo 3/2 Se xhibits giant anomalous Hall effects that exceed those of known materials by orders of magnitude.For this laboratory curiosity, as pecific electronic topology has been discoveredi nt he predicted half-metal ferromagnetic S = 1 = 2 state that makes it af ascinating example of the novel group of magnetic Weyl semimetals.Wepresent achemical view on this compound that was little understood for al ong time,b ut that is nowa lso studied with respect to skyrmion lattices and thermoelectrics.

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Controlled Hydrothermal Synthesis and Structural Characterization of a Nickel Selenide Series

Zhuang

Peng

Zhuang

et al. 2005

Chemistry A European J

157

112

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A series of nickel selenides (NiSe2 microcrystals, Ni(1-x)Se and Ni3Se2 microspheres) has been successfully synthesized through a convenient, low-temperature hydrothermal method. A good nucleation and growth environment has been created by forming a uniform and transparent solution reaction system. The compositions (including the x value of Ni(1-x)Se), phase structures, as well as the morphologies of nickel selenides, can be controlled by adjusting the Ni/Se ratio of the raw materials, the pH, the reaction temperatures and times, and so forth. The newly produced Se microspheres in the system have been used as both reactant and in situ template to the Ni(1-x)Se microspheres. It is found that Ni(1-x)Se microspheres act as the intermediate precursor during the formation of Ni3Se2 microspheres. Under certain conditions, hexagonal NiSe microspheres can be converted into rhombohedral NiSe nanowires in solution. The formation mechanisms of a series of nickel selenides has been investigated in detail by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. This work has provided a general, simple, and effective method to control the composition, phase structure, and morphology of metal selenides in aqueous solution, which will be important for inorganic synthesis methodology and further applications of selenides.

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Der Valenzzustand von Nickel, Zinn und Schwefel im ternären Chalkogenid Ni3Sn2S2 – XPS-,61Ni- und119Sn-Mößbauer-Untersuchungen und Bandstrukturrechnungen

Cited by 14 publications

References 11 publications

Von der Laborpresse zu Spins mit riesigen Effekten

Von der Laborpresse zu Spins mit riesigen Effekten

From Laboratory Press to Spins with Giant Effects

Controlled Hydrothermal Synthesis and Structural Characterization of a Nickel Selenide Series

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