Effect of Yttrium doping on structural, optical and transport properties of La<sub>2</sub>NiMnO<sub>6</sub>

Ahmad, Javed; Usman, Muriam; Nissar, Umair

doi:10.1088/2053-1591/ab5f81

Cited by 10 publications

(4 citation statements)

References 41 publications

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“…The transitions that correspond to this absorption pattern may be due to the Mn 3+ /Mn 4+ electronic transition of 3d orbitals. [ 41 ] The presence of the multiple peaks can be attributed to transitions involving various

π - π

* or η‐ π orbitals.…”

Section: Resultsmentioning

confidence: 99%

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization

Najar

Samad

Sultan

et al. 2022

Physica Status Solidi (b)

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Transition metal oxides have been the materials of interest in modern‐day science and technology. Among these materials, double perovskites have been studied very often. To explore such types of oxides and to provide a better understanding especially about lanthanum manganates, herein, the system of La2NiMnO6 is investigated, which exists in two phases, viz., monoclinic and rhombohedral via density functional theory. So far, the monoclinic phase which usually exists at low temperatures has been probed a lot; however, very little information is available about the rhombohedral phase and thus needs to be investigated. Herein, the rhombohedral phase of the material is simulated and various properties like band structure, electronic distribution of states, and absorption within the material are investigated. The study of the complex dielectric nature of the material and its refractive index with frequency variations of the incident field is also presented. The self‐interactions have been taken care‐off taking the Hubbard parameter into account. The spontaneous polarization for the first time as a berry phase using a quantum mechanical approach has also been calculated. The high dielectric constant at visible frequencies ensures the potential use of this material in the case of storage devices.

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π - π

* or η‐ π orbitals.…”

Section: Resultsmentioning

confidence: 99%

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization

Najar

Samad

Sultan

et al. 2022

Physica Status Solidi (b)

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“…Force constant depends mainly on bond length, bong angle and lattice parameters. So, by increasing or decreasing these parameters the phonon frequency would be increased or decreased [10]. In frequency region 100-300 cm -1 , considering atomic masses it can be seen from [33].…”

Section: Samplementioning

confidence: 96%

“…where Ea is the activation energy, KB is the Boltzmann constant and T is the absolute temperature [10]. The positive slopes of Arrhenius plots between 1/KBT and ln ρ gives the values of activation energies are shown in Fig.…”

Section: Electrical Propertiesmentioning

confidence: 97%

Structural, optical, and electrical properties of alkaline earth doped La2-xAxFeMnO6 (A = Ca, Sr, and Ba) double perovskites

Ahmad

Yasmin

Ahmad

et al. 2021

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The polycrystalline double perovskites La2-xAxFeMnO6 (A = Ca, Sr, Ba; x = 0.0, 0.4) were synthesized through citrate sol-gel auto-combustion technique. The structural, optical, and electrical properties were studied by x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy at room temperature, while electrical and dielectric measurements were evaluated at temperature ranges from 303 to 423 K. The XRD analysis through Rietveld refinement suggests the single phase orthorhombic (Pnma) symmetry for all the synthesized samples. The infrared reflectivity (IR) spectra were obtained from Fourier Transform Infrared spectroscopy (FTIR) measurements. The spectra were fitted by Lorentz oscillator model, to observe the optical phonon modes. The activation energies were calculated by DC resistivity measurements. According to the resistivity measurement the samples shows the semiconducting nature. The temperature dependent dielectric constant and tangent-loss with varying frequency are measured and discussed.

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“…Several DPOs in which B-site cations are referred to as ferri/ferromagnetic exhibit the magneto-resistive behaviour [12]. Double perovskites La 2 NiMnO 6 exhibits (FM) ferromagnetic and insulating behaviour at room temperature [13]. For LNMO, Ni-O-Ni and Mn-O-Mn configurations resulted due to the anti-site disorder which is responsible for (AFM) antiferromagnetic interactions, depending upon superexchange rules [14].…”

Section: Introductionmentioning

confidence: 99%

Insight into Structural and Optical Properties of Pristine and Sr2+ Doped La2NiMnO6

Ahmad

Hassan

Khan

et al. 2021

PPASA

Self Cite

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Double perovskites oxide (DPO) multiferroics La2-xSrxNiMnO6(x=0.0, 0.1, 0.2, 0.4, 0.6) are synthesized by sol-gel technique. The structural, optical and electrical (both DC and AC) properties of La2-xSrxNiMnO6 have been investigated by XRD and FTIR spectroscopy and two-probe resistivity and dielectric measurements as a function of temperature, respectively. The effect of doping of Strontium at A-site in double perovskites is discussed. XRD has revealed the formation of monoclinic structure of La2-xSrxNiMnO6 with space group P21 / n for x=0.0 and P21 for x=0.1, 0.2, 0.4, 0.6. The average crystallite size has been calculated to be in the range 31 to 46 nm as determined by Debye Scherrer equation. Infrared active optical phonons observed from reflectivity spectra have been analysed fitting the theoretical oscillators using Lorentz oscillator model. We have observed several well-resolved phonon modes in La2-xSrxNiMnO6 with increasing dopant concentration. Activation energy calculated using Arrhenius Plot is in the range of 0.31 to 0.18 eV, confirming the semiconducting nature of all samples. The dielectric constant and tangent loss as a function of temperature and frequency are also discussed for these multiferroics.

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Effect of Yttrium doping on structural, optical and transport properties of La₂NiMnO₆

Cited by 10 publications

References 41 publications

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization

Structural, optical, and electrical properties of alkaline earth doped La2-xAxFeMnO6 (A = Ca, Sr, and Ba) double perovskites

Insight into Structural and Optical Properties of Pristine and Sr2+ Doped La2NiMnO6

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Effect of Yttrium doping on structural, optical and transport properties of La2NiMnO6

Cited by 10 publications

References 41 publications

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La2NiMnO6 Double Perovskite—A New Approach to Polarization

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La2NiMnO6 Double Perovskite—A New Approach to Polarization

Structural, optical, and electrical properties of alkaline earth doped La2-xAxFeMnO6 (A = Ca, Sr, and Ba) double perovskites

Insight into Structural and Optical Properties of Pristine and Sr2+ Doped La2NiMnO6

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Effect of Yttrium doping on structural, optical and transport properties of La₂NiMnO₆

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization

Dielectric Behavior and Spontaneous Polarization as a Consequence of Berry Quantum Phase Effect: The case of La₂NiMnO₆ Double Perovskite—A New Approach to Polarization