Structure and oxygen stoichiometry in complex neodymium strontium cobalt copper oxides: [NdSrCo1−xCuxO4−y]

Grandjean, D.; Weller, M.T.

doi:10.1016/0025-5408(93)90112-q

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The powder XRD was consistent with a tetragonal K 2 NiF 4 structure (space group: I 4/mmm). The calculated room-temperature lattice parameters are a = b = 3.76 Å and c = 12.39 Å with V = 175.24 Å3 , in good agreement with the results on polycrystalline compound [13][14][15]. The dc magnetization measurements revealed FM behaviour for Nd 0.75 Sr 1.25 CoO 4 , as shown in figure 1.…”

Section: Resultssupporting

confidence: 85%

Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄

Huang¹,

Ruan²,

Lv³

et al. 2006

J. Phys.: Condens. Matter

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The magnetic properties of Nd 0.75 Sr 1.25 CoO 4 have been investigated by means of dc magnetization, ac susceptibility and electron spin resonance measurements. The specimen presented a deviation from the Curie-Weiss law at T G ∼ 230 K, ferromagnetic behaviour below T C ∼ 179 K, and a cusp structure at T SG ∼ 18 K in dc magnetization. The cusp was confirmed to be due to the existence of spin-glass states, and the deviation was argued to be a Griffiths singularity. Comparing the magnetic properties of the analogous layered cobalt oxides, the anomalous magnetic features of the specimen were attributed to the introduction of rare-earth ions, Nd 3+ .

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Section: Resultssupporting

confidence: 85%

Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄

Huang¹,

Ruan²,

Lv³

et al. 2006

J. Phys.: Condens. Matter

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“…The structure of each of the Ln 2−x Sr x CoO 4+δ compositions was refined based on the tetragonal (I4/mmm) K 2 NiF 4 structure of NdSrCoO 4 [22]. Co n+ ions were located at the 2a (0, 0, 0) sites, while Ln 3+ and Sr 2+ ions were disordered over the ninefold coordinate 4e (0, 0, z ∼ 0.360) sites with their ratio set at the nominal composition.…”

Section: Powder X-ray Diffractionmentioning

confidence: 99%

“…With the exception of the La 2−x Sr x CoO 4 compounds [16][17][18][19][20][21], other rare earth cobaltbased K 2 NiF 4 phases have received relatively little attention [21,22]. There has been substantial debate on the electronic ground state configurations of a range of rare earth cobaltates relating to the existence of the intermediate spin-state.…”

Section: Introductionmentioning

confidence: 98%

The phase diagram and crystal chemistry of strontium-doped rare earth cobaltates: Ln2−xSrxCoO4+δ (Ln=La–Dy)

James

Tedesco

Cassidy

et al. 2006

Journal of Alloys and Compounds

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On the Crystal Chemistry of Alkaline Earth‐ and Rare Earth‐Oxocobaltates

Müller‐Buschbaum

2013

Zeitschrift anorg allge chemie

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A review on the crystal chemistry of oxocobaltates of alkaline earth and rare earth metals is presented according to the formula of the compounds, based on increasing metal and oxygen content. The well‐known structures of perowskites and K2NiF4‐type compounds and their higher homologues have been ignored and cross‐referred to older publications. Cobalt shows mainly the oxidation states Co2+ and Co3+. In many cases it exhibits integer valences like Co2.28+, Co2.5+, Co2.54+, Co2.8+, Co3.5, and Co3.6+, referred in the ICSD database. The dominant coordination polyhedra are CoO4‐tetrahedra and CoO6‐oktahedra. In two cases a trigonal prismatic CoO6‐coordination is observed. Composition, crystal structure, and oxidation state of cobalt often depend on the preparation conditions. In contrast to the alkaline oxides, the alkaline earth and rare earth oxides used for preparations are less reactive. Therefore the necessary reaction temperatures are much higher. In these cases single crystals for x‐ray investigation were prepared by plasma‐burner and CO2‐LASER techniques.

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Structure and oxygen stoichiometry in complex neodymium strontium cobalt copper oxides: [NdSrCo1−xCuxO4−y]

Cited by 7 publications

References 14 publications

Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄

Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄

The phase diagram and crystal chemistry of strontium-doped rare earth cobaltates: Ln2−xSrxCoO4+δ (Ln=La–Dy)

On the Crystal Chemistry of Alkaline Earth‐ and Rare Earth‐Oxocobaltates

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Structure and oxygen stoichiometry in complex neodymium strontium cobalt copper oxides: [NdSrCo1−xCuxO4−y]

Cited by 7 publications

References 14 publications

Evidence for spin-glass states and Griffiths singularities in Nd0.75Sr1.25CoO4

Evidence for spin-glass states and Griffiths singularities in Nd0.75Sr1.25CoO4

The phase diagram and crystal chemistry of strontium-doped rare earth cobaltates: Ln2−xSrxCoO4+δ (Ln=La–Dy)

On the Crystal Chemistry of Alkaline Earth‐ and Rare Earth‐Oxocobaltates

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Product

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Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄

Evidence for spin-glass states and Griffiths singularities in Nd_0.75Sr_1.25CoO₄