Magnetic properties, resistivity and magnetoresistance effects of double perovskite La2Co1−xFexMnO6

Li, Qiuhang; Liu, Xing; Xu, Mingxiang

doi:10.1016/j.jallcom.2017.03.331

Cited by 29 publications

(9 citation statements)

References 44 publications

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“…With an increasing magnetic field, the bifurcation in the M(T) data is significantly reduced and shifts to lower temperature (figures 4(b) and (c)). ZFC magnetization, M ZFC (T) curves reveal a cusp at a temperature below T b , which is indicative of a magnetically frustrated spin-glass-like ground state in LFMO [16,27]. The cusp in M ZFC (T) gradually shifts from T p ∼ 90 K to 20 K as the field is increased from 100 Oe to 500 Oe.…”

Section: Resultsmentioning

confidence: 92%

“…Two spin freezing processes were realized at ∼20 and 255 K [18], and ∼55 and 280 K [24] in LFMO without any long-range order. Although a downward deviation in the inverse susceptibility has been found in LFMO below the Curie-Weiss line [15,18,27], it was absent in many reports [10,16,17]. While Zhang et al indicated that behavior of reciprocal susceptibility is similar to that expected for Griffiths-like phase [15], Bhame et al suggested the mixture of ferromagnetic and superparamagnetic phases in the intermediate state [10].…”

Section: Introductionmentioning

confidence: 98%

“…In particular, the structural (and associated magnetic) properties of LFMO dramatically vary, and consequently, facilitate different magnetic interactions between B-site cations. This results in the development of ferromagnetic clusters, antiferromagnetic ordering, spin glass, and Griffiths-like phases [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Nasir

Khan

Agbo

et al. 2020

J. Phys. D: Appl. Phys.

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The double perovskite La 2 FeMnO 6 is ideally expected to be a ferrimagnet with a low saturation moment of 1 µ B / f.u. Inhomogeneity in the Fe/Mn sites, along with other lattice disorders, can modify the exchange interactions in the material and result in a net saturation moment of more than 1 µ B / f.u. Here, the origin of complicated magnetic behavior is examined of a pure phase La 2 FeMnO 6 sample prepared by the sol-gel method. XRD analysis established that the material crystallizes in the orthorhombic Pbnm symmetry. The comprehensive analysis of x-ray photoelectron spectroscopy, x-ray near edge structure, and magnetic measurements acknowledge an antiferromagnetic coupling between Fe 3+ and Mn 3+ cations, thereby, resulting in the ferrimagnetic ground state for La 2 FeMnO 6 . The magnetic hysteresis loop obtained at 5 K shows a large coercivity of ∼820 Oe and a saturation moment of 1.6 µ B / f.u., hinting at partial B-site ordering in La 2 FeMnO 6 . The ac susceptibility and dc magnetization measurements indicate the existence of magnetic glassy states (of cluster-glass type) with two distinct dynamical freezing points at ∼27 and 92 K, along with a Griffiths-like phase in the material. The experimental results are discussed taking several possible exchange interactions among Fe 3+ and Mn 3+ ions in the system into consideration. The magnetic complexity of this system makes it attractive for fundamental research and technological applications.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Nasir

Khan

Agbo

et al. 2020

J. Phys. D: Appl. Phys.

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“…The positive values of the Weiss constants θ Weiss , obtained from the x ‐intercepts of the linear fits, indicate that the magnetic interactions in our samples are primarily ferromagnetic in nature. The effective paramagnetic moment, µ eff is related to C as

μ_{e f f} = \sqrt{\frac{3 k_{B} C}{N_{A} μ_{B}^{2}}} = 2.827 \sqrt{C}

where k B is the Boltzmann constant, µ B is Bohr magneton, and N A is the Avogadro's number.…”

Section: Resultsmentioning

confidence: 99%

Influence of Cation Order and Valence States on Magnetic Ordering in La₂Ni_1−xMn_1+xO₆

Nasir

Khan

Bhatt

et al. 2019

Physica Status Solidi (b)

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Among multifunctional double perovskite oxides, La2NiMnO6 has recently drawn significant attention due to its importance both in terms of understanding of fundamental physics and potential for device applications. The relative alteration in Ni:Mn ratio strongly influences the structural and magnetic properties of La2NiMnO6. The cation ratio and degree of cation order significantly affect the magnetic coupling of the two B‐site cations in these compounds. In the present study, La2Ni1−xMn1+xO6 (x = −0.25, 0, 0.25) samples with different Ni:Mn ratio have been prepared using sol–gel method and modifications of the above physical properties from that of a stoichiometric sample of La2NiMnO6 are discussed. The crystalline structures of the samples varied with different ionic ratios. While all samples exhibited ferromagnetic behavior, long‐range Ni/Mn magnetic ordering was detected in selected samples only. The experimental values of saturation magnetization were smaller than the theoretical spin‐only moments, which suggests a less ordered state for all samples. Due to an increased antiferromagnetic interaction caused by antisite disorders, the saturation magnetization decreases while the coercive field increases with decreasing Mn content.

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“…In the temperature range from 10 to 40 K, the conductive mechanism is well fitted with the adiabatic small polaron hopping (SPH) model, which can be explained by the expression: ρ = ρ 0 T exp(E A /k B T). 49 When the temperature is above 40 K, the conductive mechanism is more consistent with the thermal activation (TA) model, which can be expressed by the formula: ρ = ρ 0 exp(E A /k B T), 50 where E A refers to the energy difference between the intermediate and initial states, and the E A values of SPH and TA models are 4.23 and 8.28 meV, respectively. k B is the Boltzmann constant, and ρ 0 is the pre-exponential factor.…”

Section: ■ Results and Discussionmentioning

confidence: 88%

Low Thermal Conductivity and Magneto-suppressed Thermal Transport in a Highly Oriented FeSb₂ Single Crystal

Chen

Ding

2021

ACS Omega

Self Cite

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Thermoelectric materials have been widely explored for the potential applications in power generation and refrigeration fields. High thermal conductivity (∼500 W/m K) of single-crystal FeSb2 limits the application in cryogenic cooling. In this work, the FeSb2 single crystal has been synthesized by the self-flux method. The rocking curve results reveal that the single crystal possesses quite high crystallinity. The micromorphology image shows that the single crystal is pyknotic without observable pores or cracks. Surprisingly, the thermal conductivity is reduced by 2 orders of magnitude compared with the previous reports, which can be attributed to the enhanced phonon scattering by the defects and impurities. Furthermore, the magnetic field can further suppress the thermal transport by reducing the phonon mean-free path. The maximum suppression rate of the thermal conductivity reaches 14% at 60 K when the magnetic field varies from 0 to 9 T. In this work, we have prepared the FeSb2 single crystal with low thermal conductivity, and the magneto-suppressed thermal transport strategy can be applied to other thermoelectric materials.

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Magnetic properties, resistivity and magnetoresistance effects of double perovskite La2Co1−xFexMnO6

Cited by 29 publications

References 44 publications

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Influence of Cation Order and Valence States on Magnetic Ordering in La₂Ni_1−xMn_1+xO₆

Low Thermal Conductivity and Magneto-suppressed Thermal Transport in a Highly Oriented FeSb₂ Single Crystal

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Magnetic properties, resistivity and magnetoresistance effects of double perovskite La2Co1−xFexMnO6

Cited by 29 publications

References 44 publications

Evidence of cluster-glass and Griffiths-like phases in partially ordered La2FeMnO6 double perovskite

Evidence of cluster-glass and Griffiths-like phases in partially ordered La2FeMnO6 double perovskite

Influence of Cation Order and Valence States on Magnetic Ordering in La2Ni1−xMn1+xO6

Low Thermal Conductivity and Magneto-suppressed Thermal Transport in a Highly Oriented FeSb2 Single Crystal

Contact Info

Product

Resources

About

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Evidence of cluster-glass and Griffiths-like phases in partially ordered La₂FeMnO₆ double perovskite

Influence of Cation Order and Valence States on Magnetic Ordering in La₂Ni_1−xMn_1+xO₆

Low Thermal Conductivity and Magneto-suppressed Thermal Transport in a Highly Oriented FeSb₂ Single Crystal