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Article
Magnetic and electrical properties of Fe1.91V0.09BO4 warwickite
We have performed a complex investigation of the structure and the magnetic and electrical properties of a warwickite single crystal with the composition Fe1.91V0.09BO4. The results of Mössbauer measurements at T
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Article
Antiferromagnetic resonance and phase diagrams of gadolinium ferroborate GdFe3(BO3)4
Antiferromagnetic resonance in single crystals of rhombohedral gadolinium ferroborate GdFe3(BO3)4 was studied. The frequency-field dependences of antiferromagnetic resonance over the frequency range 26–70 GHz and...
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Article
Crystal structure and magnetization of a Co3B2O6 single crystal
The crystal structure and magnetic properties of Co3B2O6 single crystals are studied. Orthorhombic symmetry with space group Pnnm is detected at room temperature. The measurements of static magnetization and dyna...
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Article
Magnetic properties and the mechanism of formation of the uncompensated magnetic moment of antiferromagnetic ferrihydrite nanoparticles of a bacterial origin
The magnetic properties of the superparamagnetic ferrihydrite nanoparticles that form as a result of the vital activity of Klebsiella oxytoca bacteria are studied. Both an initial powder with an average number of...
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Article
Magnetic properties of Co 2 2+ Co 1 − x 3+ Fe x 3+ BO5 (x = 0.10) single crystals with a ludwigite structure
The investigation of mixed Co–Fe ludwigite single crystals shows that their magnetic properties are close to the magnetic properties of Fe3BO5 despite the predominance of cobalt ions. The magnetic properties of C...
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Article
Analysis of the exchange magnetic structure in Pb3Mn7O15
The indirect-coupling model is used to analyze the exchange magnetic structure of Pb3Mn7O15 in the hexagonal setting. The ratios of manganese ions Mn4+/Mn3+ in each nonequivalent position are determined. Pb3(Mn0....