Phases in the Perovskite-Type LaMnO3+δ Solid Solution and the La2O3-Mn2O3 Phase Diagram

Roosmalen, J.A.M. van; Vlaanderen, P. van; Cordfunke, E.H.P.; IJdo, W.L.; IJdo, D.J.W.

doi:10.1006/jssc.1995.1078

Cited by 244 publications

(143 citation statements)

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“…2), the LSM1, LSM2, LSM3, and LSM4 samples still have lower resistivity than the pure LSMO sample, implying that the LSMO phase of composite samples possesses much lower resistivity value, compared with pure LSMO. Referring to the phase diagram reported by van Roosmalen et al [21], we suggest that the formation of a Mn-excessive LSMO solid solution due to the coexisting manganese oxide in composite samples is mainly responsible for much lowered resistivity in composite samples. Thus, with a small addition of manganese oxide, the resistivity value largely drops (see LSM1 in Fig.…”

Section: Methodssupporting

confidence: 80%

“…Ascalcined powder was uniaxially pressed into pellets with the diameter of 10 mm, and then consolidated by cold isostatic pressing (~2 ton cm [21] at 1450°C in air, while the sample with the nominal composition of x = 0 is pure LSMO phase, LSMO and liquid phase are equilibrium phases for the samples with the nominal compositions of x = 0.1-0.4, and Mn 3 O 4 and liquid phase are equilibrium phases for the sample with that of x = 0.8. Therefore, at 1450°C in air, while LSMO is expected to be sintered by solid state reaction, all composite samples are expected to be densified by liquid phase sintering.…”

Section: Methodsmentioning

confidence: 99%

“…In comparison with a pure polycrystalline manganite, the perovskite manganite-oxide composites exhibited much improved LFMR effect, which was normally accompanied by a significant increase in their electrical resistivities and an abrupt decrease in their T C values. We have recently reported that the second phases, like Mn 2 O 3 (or Mn 3 O 4 ) [22] and La 2 O 3 [23], chemically compatible with LSMO [21], were very effective for avoiding such serious degradation in both T C and electrical conductivity. As a new approach to improve the LFMR effect of LSMO, we tried in this study to modify the LSMO grain boundaries by forming the eutectic structure between LSMO and manganese oxide, via liquid phase sintering at a temperature above the eutectic temperature in air of 1430°C [21].…”

Section: Introductionmentioning

confidence: 99%

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Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Kim¹,

You²,

Choi³

et al. 2014

Journal of Magnetics

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Significantly enhanced low-field magnetoresistance (LFMR) and maximum dMR/dH {(dMR/dH) max } values were successfully achieved from La 0.7 Sr 0.3 MnO 3 (LSMO)-manganese oxide composite samples prepared by liquid phase sintering, compared with those of the same composites prepared by solid state reaction. For this study, pure LSMO and LSMO-manganese oxide composites with various nominal compositions of (1-x)LSMOxMn 2 O 3 (x = 0.1, 0.2, 0.3, 0.4, and 0.8) were sintered at 1450°C, above the eutectic temperature of 1430°C, for 1 h in air. The highest LFMR value of 1.28% with the highest (dMR/dH) max value of 21.1% kOe −1 was obtained from the composite sample with x = 0.3 at 290 K in 500 Oe. This enhancement of LFMR and (dMR/dH) max values is ascribed to efficient suppression of magnetic disorder at the LSMO grain boundary, by forming a characteristic LSMO-manganese eutectic structure.

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Section: Methodssupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Kim¹,

You²,

Choi³

et al. 2014

Journal of Magnetics

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“…is the lattice parameter of the undistorted perovskite unit cell), which has been reported in La 1-x MnO 3+δ bulk before [31][32][33][34].…”

Section: Electron Diffraction Patterns and High-resolution Electron Mmentioning

confidence: 78%

Transmission electron microscopy study of epitaxial La_0.8MnO₃thin films on SrTiO₃

Zhu

2006

Philosophical Magazine

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“…In fact, the oxygen sublattice is complete and the non-stoichiometry is realized by vacancy disordering of cationic A-and B-sublattices and from a structural point of view it is more correct to represent the formula of such manganite Ln 1-y Mn 1-y O 3 [14][15][16][17][18][19][20][21][22][23][24]. Another feature distinguishing Mn-containing systems, is an obvious area of homogeneity on the metal components Ln 1-x MnO 3 and LnMn 1-x O 3 [13,[25][26][27][28][29]. During the replacement of REE in alkaline earth metals (Ca, Sr, Ba) are formed solid solutions Ln 1-x M x MnO 3±d .…”

Section: Phase Equilibrium In Systems With T = Mnmentioning

confidence: 99%

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

et al. 2015

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Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of.Review is dedicated studies of phase equilibria in the systems based on rare earth elements and 3d transition metals. It's highlighted several structural families of these compounds and is shown that many were found interesting properties for practical application, such as high conductivity up to the superconducting state, magnetic properties, catalytic activity of the processes of afterburning of exhaust gases, the high mobility in the oxygen sublattice and more.Keywords: phase equilibrium; manganites; isobaric-isothermal diagrams; solid solutions © Cherepanov V. A., Gavrilova L. Ya., Volkova N. E., Urusova A. S., Aksenova T. V., Kiselev E., 2015 IntroductionThe studies of phase equilibria in the systems based on rare earth elements and 3d transition metals and thermodynamic parameters of the oxide phases formed in these systems was initiated by Vladimir Mikhailovich Zhukovsky in 1977 under the direct supervision of Alexander Nikolaevich Petrov, as the development of contractual issues, conducted with an experienced company GIREDMET. The works on the study of the system Sm-Co-O and properties of oxide phases formed in system were then extended to other rare earth elements (REE) [1][2][3][4][5][6][7][8] and 3d transition metals [9][10][11][12][13]. A characteristic feature of these systems is the formation of oxide phases with perovskite structure AVO 3 and related. The partial substitution of rare earth elements in alkaline earth metals (AEM) leads to significant change of properties and they found a wide range of interesting for practical applications of the properties such as high conductivity up to the superconducting state, magnetic properties, catalytic activity of the processes of afterburning of exhaust gases and a variety of redox reactions, high mobility in the oxygen sublattice and more. In addition, partial substitution in the A-sublattice under constant 3d-cation in the systems Ln-T-O allows to stabilize the structure, which Cherepanov V. A., Gavrilova L. Ya., Volkova N. E., Urusova A. S., Aksenova T. V., Kiselev E. in the given conditions (temperature and oxygen pressure) are thermodynamically unstable. Therefore, further development of investigations of phase equilibria and thermodynamic stability of complex oxides were targeting the systems Ln-M-T-O (where Ln = REE, M = Ca, Sr, Ba; T = Mn, Fe, Co, Ni, Cu). When a certain percentage of similarity (in all possible formation of a phase with perovskite structure LnTO 3±d ) these systems still have a noticeable and distinctive features depending on the nature of the components. Phase equilibrium in systems with T = MnThe significant difference of perovskite phases in the manganese-containing systems Ln-Mn-O is that the oxygen content in them exceeds the stoichiometric air LnMnO 3+d . In fact, the oxygen sublattice is complete and the non-stoichiometry is realized by vacancy disordering ...

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Phases in the Perovskite-Type LaMnO3+δ Solid Solution and the La2O3-Mn2O3 Phase Diagram

Cited by 244 publications

References 0 publications

Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Transmission electron microscopy study of epitaxial La_0.8MnO₃thin films on SrTiO₃

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

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Phases in the Perovskite-Type LaMnO3+δ Solid Solution and the La2O3-Mn2O3 Phase Diagram

Cited by 244 publications

References 0 publications

Magneto-transport Properties of La0.7Sr0.3Mn1+dO3-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Magneto-transport Properties of La0.7Sr0.3Mn1+dO3-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Transmission electron microscopy study of epitaxial La0.8MnO3thin films on SrTiO3

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

Contact Info

Product

Resources

About

Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Magneto-transport Properties of La_0.7Sr_0.3Mn_1+dO₃-Manganese Oxide Composites Prepared by Liquid Phase Sintering

Transmission electron microscopy study of epitaxial La_0.8MnO₃thin films on SrTiO₃