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- W3034582078 abstract "X-ray diffraction, magnetization, ac susceptibility, and specific heat have been measured on high-quality single crystals of ${mathrm{Co}}_{3}{mathrm{Mn}}_{3}{({mathrm{O}}_{2}{mathrm{BO}}_{3})}_{2}$ ludwigite. Different from previously studied ludwigites, this compound is characterized by the existence two low-dimensional subunits each containing a unique ion. The subsystem formed by ions at sites 3-1-3, known as a three-legged ladder (3LL), contains only divalent Co ions, while the 3LL formed by ions at sites 4-2-4 contains both divalent and trivalent Mn ions. Although there is only a weak disorder caused by a very small amount of Mn at sites 1, the experimental results evidence the existence of a low-temperature spin-glass phase. A dynamic scaling analysis of ac susceptibility data according to conventional critical slowing down results in a spin-glass phase-transition temperature ${T}_{g}=31.9$ K and a dynamic exponent $zensuremath{nu}=7.05$. The temperature dependence of heat capacity has a linear contribution with the coefficient $ensuremath{gamma}=21.9$ mJ/(mol ${mathrm{K}}^{2}$), which shows that this compound has the highest degree of magnetic disorder among ludwigites, corroborating the spin-glass state at low temperatures. The origin of this state is discussed, taking into account the particular structure of each subunit and the competition between the different exchange interactions involved." @default.
- W3034582078 created "2020-06-19" @default.
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- W3034582078 date "2020-06-12" @default.
- W3034582078 modified "2023-09-24" @default.
- W3034582078 title "Spin-glass behavior in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Co</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>BO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>ludwigite with weak disorder" @default.
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- W3034582078 doi "https://doi.org/10.1103/physrevmaterials.4.064412" @default.
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