Spin–glass transition in La0.75Sr0.25Mn0.5Cr0.5−xAlxO3−δ perovskites

Azad, Abul K.; Sánchez-Benítez, Javier; Irvine, John T. S.

doi:10.1016/j.materresbull.2013.03.005

Cited by 7 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slope of linear fitting in the high p O 2 corresponds to the slope of 1/12 m where isothermal conductivity changes in the concentration of the various charge collated to p O 2 . The obtained data have shown a steady state/stable equilibration with a higher value of the measured conductivity for x = 0.1, basically, this is happened due to the reduction of Mn 4+ to Mn 3+ and atomic oxygen from the unit cell as made by Irvine et al However, the tested specimens showed a small change in the isothermal conductivity along the same variation with p O 2 for x = 0.1 and x = 0.2 at higher temperature, But it leads to an equal concentrations of electron‐ and hole‐like carriers in the material.…”

Section: Resultsmentioning

confidence: 74%

“…XRD data were collected in the 2 θ range from 10° to 90° with a 0.01° step size and count time of 70 s/step. XRD patterns were indexed using the automatic indexing program TREOR90 . SPuDS software was used to find the preliminary atomic positions and unit cell parameters.…”

Section: Methodsmentioning

confidence: 99%

“…XRD patterns were indexed using the automatic indexing program TREOR90 . SPuDS software was used to find the preliminary atomic positions and unit cell parameters. Rietveld analysis of the obtained XRD data was done through FullProf program .…”

Section: Methodsmentioning

confidence: 99%

“…In the current research, three new compositions La 0.75 Sr 0.25 Mn 0.5 Cr 0.5− x Al x O 3− δ ( x = 0.1, 0.2, 0.3) were synthesized to discover the effect of Al doping on physicochemical and surface properties. Substitution of Al, a trivalent cation, with Cr resulted in an interesting changes in electrical properties, magnetic properties, and the cation valence state . Structural, electrical, and surface characterizations of these materials are useful for fundamental understanding and applications of electrode materials in SOFCs devices.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Abdalla

Kamel

Hossain

et al. 2019

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

The main emphasis of this work is to create a new perovskite material with three different compositions (La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x AlxO 3 , x = 0.1, 0.2, 0.3) applied in both Intermediate-and High-temperature Solid Oxide Fuel Cells (IT-and HT-SOFCs). Perovskite-type polycrystalline La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x Al x O 3−δ (x = 0.1, 0.2, 0.3) powders were synthesized and formed in a single phase structure by a dry chemistry route (standard solid-state reaction method). The effect of Al doping on physicochemical and surface properties has been discovered. The compounds were crystallized in single phase rhombohedral symmetry (R-3C Space. Group). Total conductivity of Al doping in wet 5% H 2 was higher than both dry 5% H 2 and air. The obtained results enhance the electro-catalytic performance and the material conductivity as well, which will be good for anode materials in IT-and HT-SOFCs and the optimum doping is 10%. K E Y W O R D S AC conductivity, binding energy, electrical conductivity, perovskite, XPS F I G U R E 1 Rietveld refinement profile of XRD data of La 0.75 Sr 0.25 Mn 0.5 Cr 0.3 Al 0.2 O 3−δ in the rhombohedral symmetry [Color figure can be viewed at wileyonlinelibrary.com] How to cite this article: Abdalla AM, Kamel M, Hossain S, Irvine JTS, Azad AK. Synthesis and electrochemical characterization of La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x Al x O 3 , for IT-and HT-SOFCs.

show abstract

Section: Resultsmentioning

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Abdalla

Kamel

Hossain

et al. 2019

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…The zv value changes from 12 to 4 with increasing DC field, which shows that DC field have also impact on spin glass state. All these values show that the applied DC field in AC-susceptibility overcomes the interparticle interactions that reduced the blocking temperature and also affect the spin glass state[53][54][55].…”

mentioning

confidence: 99%

Surface effects and spin glass state in Co₃O₄coated MnFe₂O₄nanoparticles

Zeb¹,

Ishaque²,

Nadeem³

et al. 2018

Mater. Res. Express

View full text Add to dashboard Cite

Surface effects and spin glass state have been studied in Co 3 O 4 coated manganese ferrite (MnFe 2 O 4 ) nanoparticles by using AC and DC magnetic measurements. Average crystallite size of Co 3 O 4 coated MnFe 2 O 4 nanoparticles was 7 nm as calculated by Debye-Scherrer's formula. Simulated ZFC/FC revealed higher value of effective anisotropy (K eff ) = 5 × 10 6 erg cm 3 of these nanoparticles as compared to bulk MnFe 2 O 4 due to enhanced surface effects. Temperature dependent saturation magnetization followed the Bloch's law. Temperature dependent coercivity showed sharp increase below 25 K due to strong surface anisotropy and exchange coupling at interface between ferrimagnetic core and antiferromagnetic surface. For frequency dependent AC-susceptibility, dynamic scaling law fit confirmed the spin glass behavior in Co 3 O 4 coated MnFe 2 O 4 nanoparticles. DC field dependent AC-susceptibility showed the suppression of energy barrier, reduced activation energy and decreased strength of interparticle interactions with increasing DC field. Slow spin relaxation in ZFC protocol further confirmed the presence of spin-glass behavior. All this analysis confirmed the existence of spin-glass behavior as attributed to disordered surface spins and interparticle interactions in these nanoparticles, which gets suppressed after the application of moderate DC field. Figure 3. (a) M H loop of Co 3 O 4 coated MnFe 2 O 4 nanoparticles at 5 K (b) temperature dependent saturation magnetization with Bloch's law fit and (c) temperature dependent coercivity.

show abstract

Magnetic Properties of La0.7Ba0.3Mn1−xAlxO3 (0 ≤ × ≤ 0.15) Perovskites

Pandey

Modi

2019

J Supercond Nov Magn

View full text Add to dashboard Cite

Spin–glass transition in La0.75Sr0.25Mn0.5Cr0.5−xAlxO3−δ perovskites

Cited by 7 publications

References 34 publications

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Surface effects and spin glass state in Co₃O₄coated MnFe₂O₄nanoparticles

Magnetic Properties of La0.7Ba0.3Mn1−xAlxO3 (0 ≤ × ≤ 0.15) Perovskites

Contact Info

Product

Resources

About

Spin–glass transition in La0.75Sr0.25Mn0.5Cr0.5−xAlxO3−δ perovskites

Cited by 7 publications

References 34 publications

Synthesis and electrochemical characterization of La0.75Sr0.25Mn0.5Cr0.5−xAlxO3, for IT‐ and HT‐SOFCs

Synthesis and electrochemical characterization of La0.75Sr0.25Mn0.5Cr0.5−xAlxO3, for IT‐ and HT‐SOFCs

Surface effects and spin glass state in Co3O4coated MnFe2O4nanoparticles

Magnetic Properties of La0.7Ba0.3Mn1−xAlxO3 (0 ≤ × ≤ 0.15) Perovskites

Contact Info

Product

Resources

About

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−_xAl_xO₃, for IT‐ and HT‐SOFCs

Surface effects and spin glass state in Co₃O₄coated MnFe₂O₄nanoparticles