Synthesis and crystal structure of a novel ludwigite borate: Mg2InBO5

Li, H.K.; Wang, L.; Cai, Gemei; Fan, Jingjing; Fan, Xing; Jin, Zhanpeng

doi:10.1016/j.jallcom.2013.04.024

Cited by 17 publications

(6 citation statements)

References 55 publications

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“…In figure , numbers 1–4 designate non‐equivalent positions of the metal ion. As seen from Table taken from , in all compounds M +3 , M +4 , M +5 prefer to occupy the 4 th position, and at least the 2 nd one.…”

Section: Crystal Structurementioning

confidence: 88%

Ludwigites: From natural mineral to modern solid solutions

Софронова

Назаренко

2017

Crystal Research and Technology

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Ludwigites is a type of oxyborates compounds with BO 3 groups, which have low-dimensional elements: stairs, zigzag walls, tapes. Such structural features influence on the physical properties of the compounds and cause charge ordering, the existence of two magnetic subsystems, ordered at different temperatures in the perpendicular direction, the quasi-one-dimensional magnetism, spin-glass state. In this survey, we have summarized all known experimental and theoretical studies and analyzed the proposed by the authors mechanisms of phase transitions in the ludwigite structure oxyborates.

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Section: Crystal Structurementioning

confidence: 88%

Ludwigites: From natural mineral to modern solid solutions

Софронова

Назаренко

2017

Crystal Research and Technology

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“…Ludwigites can be synthesized by the solid-state reaction or flux method. ,,,, In the present work, the single crystals of Co 2.5 Ge 0.5 BO 5 were obtained using flux synthesis from the system 66% mass (Bi 2 Mo 3 O 12 + 2.4·B 2 O 3 + 0.7·Na 2 O) + 34% mass (CoO + B 2 O 3 + GeO 2 ).…”

Section: Experimental and Theoretical Techniquesmentioning

confidence: 99%

“…Transition-metal borates are gaining increasing attention due to the extraordinary magnetic, optical, and electronic properties resulting from the strong interrelation between the lattice, electronic, and spin degrees of freedom. Along with magnetic transitions, these materials demonstrate charge- and orbital orderings, metal–insulator transitions, and spin crossovers under the action of temperature, magnetic field, or external pressure. − The high thermal and chemical stability, a relatively high laser damage threshold, and wide transparent regions make borates promising second-order nonlinear optical materials (NLO) . Borates are also important for applications, due to their high predicted electrical capacity and tunable voltage. − …”

Section: Introductionmentioning

confidence: 99%

Temperature- and Field-Induced Transformation of the Magnetic State in Co_2.5Ge_0.5BO₅

et al. 2022

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A tetravalent-substituted cobalt ludwigite Co2.5Ge0.5BO5 has been synthesized using the flux method. The compound undergoes two magnetic transitions: a long-range antiferromagnetic transition at T N1 = 84 K and a metamagnetic one at T N2 = 36 K. The sample-oriented magnetization measurements revealed a fully compensated magnetic moment along the a- and c-axes and an uncompensated one along the b-axis leading to high uniaxial anisotropy. A field-induced enhancement of the ferromagnetic correlations at T N2 is observed in specific heat measurements. The DFT+GGA calculation predicts the spin configuration of (↑↓↓↑) as a ground state with a magnetic moment of 1.37 μB/f.u. The strong hybridization of Ge(4s, 4p) with O (2p) orbitals resulting from the high electronegativity of Ge4+ is assumed to cause an increase in the interlayer interaction, contributing to the long-range magnetic order. The effect of two super–superexchange pathways Co2+-O-B-O-Co2+ and Co2+-O-M4-O-Co2+ on the magnetic state is discussed.

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“…x Mn x BO 5 existence was made on the basis of the criterion presented in [14], which consists in a certain ratio of the radius of the tetra-/ trivalent cation to the divalent radius. The flux in a mass of 67 g was prepared from initial oxides Mn 2 O 3 and NiO in combination with sodium carbonate at the temperature T = 1100°C in a platinum crucible with the volume V = 100 cm 3 by sequential melting of powder mixtures, first Bi 2 Mo 3 O 12 and B 2 O 3 , then Mn 2 O 3 and NiO; finally, Na 2 CO 3 was added in portions.…”

Section: The Synthesismentioning

confidence: 99%

Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion

Софронова

Moshkina

Назаренко

et al. 2018

Journal of Magnetism and Magnetic Materials

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Crystals of ludwigite Ni 2.14 Mn 0.86 BO 5 were synthesized by flux growth technique and contain Mn 3+ and Mn 4+. A possible mechanism of the manganese valence states stabilization has been proposed. The structural and magnetic characterization of the synthesized samples has been carried out in detail. The cations composition and Mn valence states of the crystal were determined using X-ray diffraction and EXAFS technique. The comparative analysis was carried out between the studied crystal and Ni 2 MnBO 5 synthesized previously. Magnetic susceptibility measurements were carried out. The magnetic transition in the studied composition occurs at the 100 K temperature that is higher than in Ni 2 MnBO 5 although the studied composition is more disordered. The calculations of the exchange integrals in the frameworks of indirect coupling model revealed strong antiferromagnetic interactions. The several magnetic subsystems existence hypothesis was supposed. The possible magnetic structure was suggested from the energies estimation for different ordering variants.

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Synthesis and crystal structure of a novel ludwigite borate: Mg2InBO5

Cited by 17 publications

References 55 publications

Ludwigites: From natural mineral to modern solid solutions

Ludwigites: From natural mineral to modern solid solutions

Temperature- and Field-Induced Transformation of the Magnetic State in Co_2.5Ge_0.5BO₅

Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion

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Synthesis and crystal structure of a novel ludwigite borate: Mg2InBO5

Cited by 17 publications

References 55 publications

Ludwigites: From natural mineral to modern solid solutions

Ludwigites: From natural mineral to modern solid solutions

Temperature- and Field-Induced Transformation of the Magnetic State in Co2.5Ge0.5BO5

Chemical disorder reinforces magnetic order in ludwigite (Ni,Mn)3BO5 with Mn4+ inclusion

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Temperature- and Field-Induced Transformation of the Magnetic State in Co_2.5Ge_0.5BO₅