Mixed Kagomeand Triangular Lattices in TransitionMetal Sulfate Compounds M<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> (M = Co, Ni, Cu)

A series of transition metal sulfate compounds, M<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> (M = Co, Ni, Cu), have been hydrothermally synthesized and exhibit unique topological spin lattices composed of mixed kagomé and triangular motifs. Co<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> and Ni<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> feature alternating kagomé and triangular layers along the <i>c</i>-axis, while Cu<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> shows merged kagomé and triangular motifs extending along the <i>a</i>-axis due to greater octahedral distortion. Magnetic measurements reveal that Co<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> exhibits a ferrimagnetic transition at ∼6.5 K with strong frustration, while Ni<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> undergoes long-range magnetic order at ∼24 K and exhibits spin-glass behavior at ∼2.5 K.

Publication Details

Journal
Figshare
Published
2025-03-24
DOI
https://doi.org/10.1021/acs.inorgchem.5c00165.s002
Primary Topic
Advanced Condensed Matter Physics
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article
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article

Mixed Kagomeand Triangular Lattices in TransitionMetal Sulfate Compounds M7(SO4)3(OH)8 (M = Co, Ni, Cu)

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Advanced Condensed Matter Physics
article

Mixed Kagomeand Triangular Lattices in TransitionMetal Sulfate Compounds M7(SO4)3(OH)8 (M = Co, Ni, Cu)

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Abstract

A series of transition metal sulfate compounds, M<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> (M = Co, Ni, Cu), have been hydrothermally synthesized and exhibit unique topological spin lattices composed of mixed kagomé and triangular motifs. Co<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> and Ni<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> feature alternating kagomé and triangular layers along the <i>c</i>-axis, while Cu<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> shows merged kagomé and triangular motifs extending along the <i>a</i>-axis due to greater octahedral distortion. Magnetic measurements reveal that Co<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> exhibits a ferrimagnetic transition at ∼6.5 K with strong frustration, while Ni<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> undergoes long-range magnetic order at ∼24 K and exhibits spin-glass behavior at ∼2.5 K.

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Mixed Kagomeand Triangular Lattices in TransitionMetal Sulfate Compounds M<sub>7</sub>(SO<sub>4</sub>)<sub>3</sub>(OH)<sub>8</sub> (M = Co, Ni, Cu) · Figshare (2025) | TGRS Research Map | TGRS