Magnetic materials containing LaSr manganite phase

Staneva, A.; Gattef, E.; Dimitriev, Y.; Mikhov, M.; Geshev, J.

doi:10.1016/j.solidstatesciences.2003.10.009

Cited by 9 publications

(6 citation statements)

References 29 publications

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“…6) strongly suggesting the existence of the compound as LaMn [29]. The same band is dominating in the spectrum of La 0.6 Sr 0.4 MnO 3 [30]. A second phase, probably hexagonal La 2 O 3 , appears when using LaMn(N)Cit-60 as a precursor (Fig.…”

Section: Thermal Decomposition Of the Complexesmentioning

confidence: 99%

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Petrova

Todorovsky

Vasileva³

2005

Open Chemistry

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Mn-, LaMn-and LaCaMn-citrates were synthesized at 60-120 • C in ethylene glycol medium using chlorides or nitrates as metal sources. Their composition, IR spectra and thermal decomposition were studied. Equimolar La/Mn ratio has been established in the complex, prepared from chloride solution with the same initial composition of the metals. In the isolated three-metallic complex the molar ratio of the metals deviates from the composition in the initial solution. The final products of the heating of Mn-and mixed-metal LaMn-citrates at 1000 • C are phase-homogeneous Mn 3 O 4 (hausmannite) and LaMnO 3 respectively. Parasitic phase(s) are observed in La x Ca 1−x Mn y O 3 , produced from LaCaMn-citrate.

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Section: Thermal Decomposition Of the Complexesmentioning

confidence: 99%

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Petrova

Todorovsky

Vasileva³

2005

Open Chemistry

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“…The band containing the stretching modes appears to be anomalously broadened as compared to the parent Pm3m structure, where it is concentrated around 640 -645 cm -1 [20]. The band observed at ~ 540 cm -1 in the spectra of [21] is attributed to vibrations of the Mn 3+ O 6 -octahedron while those at ~610 cm -1 -to those of the Mn 4+ O 6 group. The band observed at ~ 540 cm -1 in the spectra of [21] is attributed to vibrations of the Mn 3+ O 6 -octahedron while those at ~610 cm -1 -to those of the Mn 4+ O 6 group.…”

Section: Resultsmentioning

confidence: 86%

“…We assign these bands to two A u -E u pairs originating from the cubic F 1u bending and stretching modes [20], respectively. A possible explanation for this broadening is given by the assignment of absorption subbands in the interval 500-620 cm -1 by Staneva et al [21]. A possible explanation for this broadening is given by the assignment of absorption subbands in the interval 500-620 cm -1 by Staneva et al [21].…”

Section: Resultsmentioning

confidence: 99%

Growth and characterization of large La_1‐xPb_xMnO_3+δ (x=0.32–0.35) crystals

Milenov¹,

Rafailov

Abrashev

et al. 2009

Cryst. Res. Technol.

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Large crystals of La 0.63 Pb 0.37 MnO 3+δ with small La(Pb)-deficiency of about 0.005-0.01 at.% were grown by high temperature solution growth method. The structure of the grown crystals was determined as rhombohedral with R-3 space group by single-crystal X-ray diffractometry. The surface morphology of the crystals and the exact chemical composition was examined by scanning electron microscopy and energy dispersive X-ray analysis methods, respectively. The IR-transmission spectrum reveals the presence of Mn 3+ O 6 -and Mn 4+ O 6 -octahedra in the lattice of La 0.63 Pb 0.37 Mn O 3+δ crystals.

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“…The formation of glass‐ceramics can have a particular technological interest because, when compared with single crystals and ceramic materials, their main properties (electrical, mechanical, optical, and magnetic) can be tailored by controlling the volume fraction of the dispersed active crystalline phase . In other studies, it has been focused on the glass formation region of the lanthanum‐manganese‐borate system and the preparation of glass‐ceramic materials containing the La 0.6 Sr 0.4 MnO 3 and La 0.6 Pb 0.4 MnO 3 crystalline phases . Colossal magnetoresistance has been observed in the La 1‐y Pb y MnO 3 phase .…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃

Raykov

Staneva

Dimitriev

et al. 2018

Int J of Appl Glass Sci

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The electrical properties of new borate‐based glasses in the system La2O3‐Gd2O3‐PbO‐MnO2‐B2O3, prepared by the melt‐quenching technique, were investigated. All of these glasses have a fixed content of B2O3 (%mol = 30). The electrical measurements were carried out by impedance spectroscopy in the frequency range from 100 Hz to 1 MHz, and temperatures from 100 to 400°C, below the glass temperature. The AC conductivity increases with temperature according to the Arrhenius law, with a single activation energy. The structural and thermal properties of the glasses were investigated by performing infrared spectroscopy, X‐ray diffraction, and differential thermal analysis. The dependence of the various electrical parameters as a function of the glass composition and temperature was discussed. Evaluations of models and theory of the relaxation mechanisms were predominantly made through comparison with experimental data and a set of phenomenological parameters.

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Magnetic materials containing LaSr manganite phase

Cited by 9 publications

References 29 publications

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Growth and characterization of large La_1‐xPb_xMnO_3+δ (x=0.32–0.35) crystals

Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃

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Magnetic materials containing LaSr manganite phase

Cited by 9 publications

References 29 publications

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

Growth and characterization of large La1‐xPbxMnO3+δ (x=0.32–0.35) crystals

Dielectric relaxation in glass and glass‐ceramic materials of the system La2O3‐Gd2O3‐PbO‐MnO‐B2O3

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Growth and characterization of large La_1‐xPb_xMnO_3+δ (x=0.32–0.35) crystals

Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃