Thermal Behavior of Antiferromagnets FeBO3 and Fe3BO6 at Negative Temperatures

Biryukov, Yaroslav P.; Бубнова, Р. С.; Дмитриева, Н. В.; Филатов, С. К.

doi:10.1134/s1087659619020032

Cited by 7 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Low-and high-temperature X-ray powder diffraction (93 T 1373 K) DSC (see Fig. S3), Mo ¨ssbauer spectroscopy and magnetometry (see x3.2 and x3.3), LT-and HT-XRD data indicate that there are no phase transitions obtained in the temperature range 5-1650 K. It is interesting to note that in contrast to vonsenite, hulsite, synthetic Fe 3 (BO 4 )O 2 and FeBO 3 (Biryukov et al, 2018(Biryukov et al, , 2019(Biryukov et al, , 2020(Biryukov et al, , 2021 no sharp anomalies in unit-cell parameters are found in azoproite which could be due to magnetostriction or magnetoelastic effects because of the absence of magnetic phase transitions. Azoproite melts at temperatures higher than 1600 K (Fig.…”

Section: Magnetometry Studiesmentioning

confidence: 96%

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

Biryukov¹,

Zinnatullin²,

Levashova³

et al. 2022

Acta Crystallogr B Struct Sci Cryst Eng Mater

View full text Add to dashboard Cite

This work is devoted to an investigation of elemental composition, crystal structure and thermal expansion of natural oxoborate azoproite from the Tazheran massif (Siberia, Russia) in the temperature range 5–1650 K. Elemental composition was determined by energy-dispersive X-ray spectroscopy (EDX). Its empirical formula based on five oxygen atoms is (Mg1.81Fe2+ 0.19)∑2.00(Fe3+ 0.36Ti0.26Mg0.26Al0.12)∑1.00O2(BO3). Local environment, oxidation states and ratio of Fe atoms are determined using Mössbauer spectroscopy and compared with EDX and single-crystal X-ray diffraction (SCXRD) data. A refinement of the crystal structure from SCXRD data collected at 293 K was provided for the first time. The structure could be described both in terms of cation- and anion-centered polyhedra. It is composed of vertex- and edge-sharing metal–oxygen [MO6] n − octahedra that form extended zigzag chains along the a axis building up a framework with the [BO3]3− triangles located in its distorted trigonal channels. From the other point of view, there are double chains consisting of oxocentred [OM 4] n + tetrahedra and [OM 5] n + tetragonal pyramids forming six-membered rings with the triangles in its cavities. Four non-equivalent Mn + sites are occupied by cations as follows: M(1) (2a) and M(2) (2d) – Mg, M(3) (4g) – Mg and Fe2+, M(4) (4h) – Fe3+, Ti4+, Mg and Al3+. According to differential scanning calorimetry, low- and high-temperature powder X-ray diffraction (LT- and HT-XRD) data, Mössbauer spectroscopy and magnetometry data (5 ≤ T ≤ 1650 K), there are no phase transitions obtained in the temperature range investigated. However, some anomalies in temperature dependencies of unit-cell parameters caused by a partial Fe2+ → Fe3+ oxidation are found in the range 873–1173 K. Azoproite melts at a temperature higher than 1600 K. Eigenvalues of the thermal expansion tensor are calculated for the oxoborate and thermal expansion is described in comparison with its crystal structure.

show abstract

Section: Magnetometry Studiesmentioning

confidence: 96%

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

Biryukov¹,

Zinnatullin²,

Levashova³

et al. 2022

Acta Crystallogr B Struct Sci Cryst Eng Mater

View full text Add to dashboard Cite

show abstract

“…Recently, we investigated the crystal and magnetic structures, and thermodynamic and magnetic properties of ironcontaining borates such as synthetic norbergite-like Fe 3 (BO 4 )O 2 and calcite-like FeBO 3 , natural vonsenite and hulsite (Biryukov et al, 2018(Biryukov et al, , 2019(Biryukov et al, , 2020 by in situ hightemperature Mo ¨ssbauer spectroscopy and X-ray diffraction. Such a set of highly precise methods is excellent for the investigation of a number of processes occurring with an increase or a decrease in temperature: cation distribution, Fe 2+ to Fe 3+ oxidation, and magnetic transitions and their influence on the thermal behaviour of the borates.…”

Section: Figurementioning

confidence: 99%

“…Our recent work (Biryukov et al, 2018(Biryukov et al, , 2019Chezhina et al, 2019) has shown that in order to calculate thermal expansion coefficients more accurately the temperature dependencies of the unit-cell parameters could be divided into several intervals, generally before and after the critical temperatures. Thus, the temperature dependencies of the orthorhombic unit-cell parameters, as well as the volume of vonsenite [Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Low-temperature investigation of natural iron-rich oxoborates vonsenite and hulsite: thermal deformations of crystal structure, strong negative thermal expansion and cascades of magnetic transitions

Biryukov

Zinnatullin

Черосов

et al. 2021

Acta Crystallogr B Struct Sci Cryst Eng Mater

View full text Add to dashboard Cite

This work is devoted to an investigation of the magnetic properties and thermal behaviour of the natural oxoborates vonsenite and hulsite in the temperature range 5–500 K. The local environment, the oxidation states of the Fe and Sn atoms, and the charge distribution were determined using Mössbauer spectroscopy and are in accordance with a refinement of the crystal structure of hulsite from single-crystal X-ray diffraction data (SCXRD) in anisotropic approximation for the first time. The magnetic properties were studied by vibrating sample magnetometry (VSM) (5 ≤ T ≤ 400 K) and are reported for the first time for iron-rich hulsite. Both oxoborates show a very complex magnetic behaviour. Cascades of magnetic transitions are revealed and the critical temperatures were determined. The sequences of magnetic transitions in both vonsenite and hulsite with increasing temperature were found to be as follows: magnetically ordered state → partial magnetic ordering → paramagnetic state. According to X-ray diffraction data (93 ≤ T ≤ 500 K), these processes are accompanied by anomalies in the unit-cell parameters and thermal expansion of the oxoborates at critical temperatures. A strong negative volume thermal expansion is observed for both oxoborates at temperatures below ∼120 K.

show abstract

Effect of magnetoelastic interaction on the thermal expansion of the trigonal crystal FeBO3

Seleznyova

Smirnova

Strugatsky

et al. 2022

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Thermal Behavior of Antiferromagnets FeBO3 and Fe3BO6 at Negative Temperatures

Cited by 7 publications

References 13 publications

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

Low-temperature investigation of natural iron-rich oxoborates vonsenite and hulsite: thermal deformations of crystal structure, strong negative thermal expansion and cascades of magnetic transitions

Effect of magnetoelastic interaction on the thermal expansion of the trigonal crystal FeBO3

Contact Info

Product

Resources

About

Thermal Behavior of Antiferromagnets FeBO3 and Fe3BO6 at Negative Temperatures

Cited by 7 publications

References 13 publications

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe2+)2(Fe3+,Ti,Mg,Al)O2(BO3): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe2+)2(Fe3+,Ti,Mg,Al)O2(BO3): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

Low-temperature investigation of natural iron-rich oxoborates vonsenite and hulsite: thermal deformations of crystal structure, strong negative thermal expansion and cascades of magnetic transitions

Effect of magnetoelastic interaction on the thermal expansion of the trigonal crystal FeBO3

Contact Info

Product

Resources

About

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)

X-ray diffraction and Mössbauer spectroscopy study of oxoborate azoproite (Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg,Al)O₂(BO₃): an in situ temperature-dependent investigation (5 ≤ T ≤ 1650 K)