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- Antiferromagnetic materials, ferromagnetic materials, magnetic domains, magnetic hysteresis, magnetic particles, magnetic transitions, magnetostatics, numerical analysis (1)
- Bismuth compounds (1)
- Cobalt compounds (1)
- Composite materials (1)
- Dielectric resonance (1)
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- Electronic specific heat, iron chalcogenide superconductor, multiband superconductivity, magnetic field dependence (1)
- Ferromagnetic resonance (1)
- Field emission electron microscopy (1)
- Grain size (1)
- Magnetoelectric effects (1)
- Multiferroics (1)
- Scanning electron microscopy (1)
- Sintering (1)
- Sodium compounds (1)
- X-ray diffraction (1)
Articles 1 - 3 of 3
Full-Text Articles in Physics
Electric Field Tunable Magnetic Properties Of Lead-Free Na0.5bi0.5tio3/Cofe2o4 Multiferroic Composites, S Narendra Babu, Seong Gi Min, Leszek Malkinski
Electric Field Tunable Magnetic Properties Of Lead-Free Na0.5bi0.5tio3/Cofe2o4 Multiferroic Composites, S Narendra Babu, Seong Gi Min, Leszek Malkinski
Physics Faculty Publications
Lead-free multiferroic particulate composites of Na0.5Bi0.5TiO3 (NBT) and CoFe2O4 (CFO) have been synthesized by solid-state sintering method. A systematic study of structural, magnetic and magnetoelectric (ME) properties is undertaken. Structural and morphology studies carried out by x-ray diffraction and field emission scanning electron microscopy indicate formation of single phase for parent phases and presence of both phases in the composites. Magnetic properties are investigated using vibrating sample magnetometer and ferromagnetic resonance (FMR) measurements at room temperature. Strong ME coupling is demonstrated in NBT-CFO 70-30 mol% composite by an electrostatically tunable FMR field …
Calorimetric Evidence Of Strong-Coupling Multiband Superconductivity In Fe(Te0.57se0.43) Single Crystal, J. Hu, T. J. Liu, B. Qian, A. Rotaru, L. Spinu, Z. Q. Mao
Calorimetric Evidence Of Strong-Coupling Multiband Superconductivity In Fe(Te0.57se0.43) Single Crystal, J. Hu, T. J. Liu, B. Qian, A. Rotaru, L. Spinu, Z. Q. Mao
Physics Faculty Publications
We have investigated the specific heat of optimally doped iron chalcogenide superconductor Fe(Te0.57Se0.43) with a high-quality single crystal sample. The electronic specific heat Ce of this sample has been successfully separated from the phonon contribution using the specific heat of a nonsuperconducting sample (Fe0.90Cu0.10)(Te0.57Se0.43) as a reference. The normal-state Sommerfeld coefficient γn of the superconducting sample is found to be ~26.6 mJ/mol K2, indicating intermediate electronic correlation. The temperature dependence of Ce in the superconducting state can be best fitted using a double-gap …
Thermally Activated Transitions In A System Of Two Single Domain Ferromagnetic Particles, Dorin Cimpoesu, Alexandru Stancu, Ivo Kilk, Ching-Ray Chang, Leonard Spinu
Thermally Activated Transitions In A System Of Two Single Domain Ferromagnetic Particles, Dorin Cimpoesu, Alexandru Stancu, Ivo Kilk, Ching-Ray Chang, Leonard Spinu
Physics Faculty Publications
Numerical simulations based on the stochastic Langevin equation are applied here to a system of two uniaxial single domain ferromagnetic particles with antiferromagnetic dipolar coupling. The hysteresis loops of a strongly coupled systems exhibit fully demagnetized, intermediate metastable configurations which separate the two fully saturated states. At small magnetostatic couplings, on the other hand, and at sufficiently weak damping, the intermediate metastable configuration becomes only partially demagnetized. This state cannot be associated with any single local minimum of the free energy function.