A5030973846- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Magnetic Properties and Synthesis of Ferrites
- Ferroelectric and Piezoelectric Materials
- Physics of Superconductivity and Magnetism
- Magnetic Properties of Alloys
- Rare-earth and actinide compounds
- X-ray Diffraction in Crystallography
- 2D Materials and Applications
- Iron-based superconductors research
- Crystallization and Solubility Studies
- Graphene research and applications
- Theoretical and Computational Physics
- Electromagnetic wave absorption materials
- Quantum and electron transport phenomena
- Advancements in Battery Materials
- Advanced Memory and Neural Computing
- Electronic and Structural Properties of Oxides
- Chemical Synthesis and Reactions
- Magnetic properties of thin films
- Advanced Antenna and Metasurface Technologies
- Inorganic Chemistry and Materials
- Microwave Dielectric Ceramics Synthesis
- Advanced Thermodynamics and Statistical Mechanics
Uppsala University
2016-2025
University of South Florida
2022
Stockholm University
2016
Rutgers, The State University of New Jersey
2013-2016
Bose (United States)
2014
École Nationale Supérieure d'Ingénieurs de Caen
2010-2013
Centre National de la Recherche Scientifique
2010-2013
Laboratoire de Cristallographie et Sciences des Matériaux
2011-2013
S.N. Bose National Centre for Basic Sciences
2007-2012
Université de Caen Normandie
2011
In this paper we report the structural and property (magnetic electrical transport) measurements of nanocrystals half-doped ${\text{La}}_{0.5}{\text{Ca}}_{0.5}{\text{MnO}}_{3}(\text{LCMO})$ synthesized by chemical route, having particle size down to an average diameter 15 nm. It was observed that reduction leads change in crystal structure, room temperature structure is arrested so does not evolve on cooling unlike bulk samples. The mainly affects orthorhombic distortion lattice. By making...
Innovations in resistive switching devices constitute a core objective for the development of ultralow-power computing devices. Forming-free is type that eliminates need an initial high voltage formation conductive filaments and offers promising opportunities to overcome limitations traditional Here, we demonstrate mixed charge state oxygen vacancy-engineered electroforming-free NiFe2O4 (NFO) thin films, fabricated as asymmetric Ti/NFO/Pt heterostructures, first time. Using pulsed laser...
Abstract Efficient control of the structural, magnetic and electrical properties Rare-earth (RE) based perovskites (ABO 3 ) is crucial for advancing spintronic applications can be achieved by means site-specific substitution. In this comprehensive study, we explore role (Nd) A-site (Mn) B-site co-substitution on physical pristine LaCoO perovskite. The resulting compound La 0.5 Nd Co Mn O (LNCMO) with an orthorhombic ( Pbnm crystal structure a = 5.4811(4) Å, b 5.5074(4) Å c =7.7491(5)...
We describe a magnetic relation in analogy to the well-known dielectric Lyddane-Sachs-Teller [R. H. Lyddane , ]. This follows directly from model equations for nuclear induction due fast oscillating electromagnetic fields [F. Bloch, ] and relates static permeability with product over all ratios of antiresonance resonance frequencies associated excitations within given specimen. The differs significantly its analog where properties are related squares frequencies. demonstrate validity using...
In this paper we report an investigation on the ferromagnetic state and nature of transition nanoparticles $\mathrm{La_{0.67}Ca_{0.33}MnO_3}$ using magnetic measurements neutron diffraction. The was made with crystal size down to $15$ nm. data show that even a nm finite spontaneous magnetization ($M_S$) although value is much reduced compared bulk sample. We observed non-monotonic variation paramagnetic temperature $T_C$ $d$ found initially enhances reduction, but for $d < 50$ it decreases...
Polar LiNbO3-type magnetic oxides have been extended, for the first time, to A2BB′O6 family. Mn2+2Fe3+M5+O6 (M=Nb, Ta), synthesized at high pressure, adopt a polar structure, as demonstrated by electron diffraction and second harmonic generation effect, they interesting properties. As service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but not copy-edited or typeset. Technical...
Polar oxides are technically of great interest but difficult to prepare. Our recent discoveries predicted that polar can be synthesized in the corundum-derivative A2BB'O6 family with unusually small cations at A-site and a d(0) electron configuration ion B'-site. When magnetic transition-metal ions incorporated more interesting form. In this work we experimentally verified prediction prepared LiNbO3 (LN)-type Zn2FeTaO6 via high pressure temperature synthesis. The crystal structure analysis...
Despite intense efforts on all known quasi-two-dimensional superconductors, the origin and exact boundary of electronic orderings, particularly charge density waves superconductivity, are still attractive problems with several open questions. Here, in order to reveal how superconducting gap evolves, we report high quality complementary measurements magneto-optical imaging, specific heat, magnetic susceptibility, resistivity measurements, Andreev spectroscopy, London penetration depth...
Magnetic nanocomposites (NCs) are extremely appealing for a wide range of energy-related technological applications, specifically as building blocks next-generation permanent magnets. The design such nanostructures requires precise chemical synthesis methods, which will permit the fine-tuning magnetic properties. Here we present an in-depth structural, morphological and characterization ferrite-based obtained through bottom-up sol–gel approach. combination high coercivity hard phase...
Magnetic double perovskite oxides have steadily emerged as an important class of functional materials. A clear understanding the complex interactions that govern magnetic behavior, and thereby, functionality in these mixed valence compounds, however, remains elusive. In this study, we show nanostructure forms compounds is at root their behavior. Using complementary experimental micromagnetic simulation results, uncovered polycrystalline Sm2CoMnO6, a typical oxide, established how drives its...
The complex nature of magnetic ordering in the spinel $\mathrm{C}{\mathrm{o}}_{2}\mathrm{Ti}{\mathrm{O}}_{4}$ is investigated by analyzing temperature and field dependence its magnetization ($M$), specific heat (${C}_{\mathrm{p}}$), ac susceptibilities ${\ensuremath{\chi}}^{\ensuremath{'}}$ ${\ensuremath{\chi}}^{\ensuremath{''}}$. X-ray diffraction sample synthesized solid-state reaction route confirmed structure whereas x-ray photoelectron spectroscopy shows electronic to be...
Establishing ultimate spin current efficiency in graphene over industry-standard substrates can facilitate research and development exploration of functions sensing. At the same time, it resolve core issues relaxation physics while addressing skepticism graphene's practicality for planar spintronic applications. In this work, we reveal an exceptionally long communication capability 45 μm highest to date diffusion length 13.6 on SiO2/Si at room temperature. Employing commercial chemical vapor...
Abstract Above‐room‐temperature polar magnets are of interest due to their practical applications in spintronics. Here we present a strategy design high‐temperature magnetic oxides the corundum‐derived A 2 BB′O 6 family, exemplified by non‐centrosymmetric ( R 3) Ni 3 TeO ‐type Mn 2+ Fe 3+ Mo 5+ O , which shows strong ferrimagnetic ordering with T C =337 K and demonstrates structural polarization without any ions n −1)d 10 s 0 d or stereoactive lone‐pair electrons. Density functional theory...
A magnetic perovskite-spinel oxide nanocomposite synthesized through a sol-gel self-combustion process is used for the first time as an adsorbent to remove toxic heavy metals (i.e., Pb
Li3V2(PO4)3 (LVP) is a potential cathode material for lithium-ion batteries (LIBs) because of its elevated theoretical capacity and high operational voltage. The low electronic ionic conductivities LVP will lead to sluggish charge discharge kinetics, resulting in diminished rate reduced at rates. Herein, we synthesized (Li3V2-xCax(PO4)3) LVCaP/C (Li3V2-xSrx(PO4)3) LVSrP/C cathodes by incorporating Ca2+ Sr2+ within the crystal lattice attain efficient highly stable storage. introduction...
Short-range spin correlations, memory and rejuvenation effects have been reported in the trication oxispinel ZnMnCoO4whose low-temperature dynamics, triggered by magnetic frustration (fr~ 6), could be better explained 'phenomenological' hierarchical spin-glass model than short-range droplet theory. Accordingly, aging mechanism of system had an asymmetric response to positive negative thermal cycles within cluster-glass state (~ 32.6 K), demonstrated a organization phase space where its...
In this paper we report the structural, magnetic, and transport properties of nanoparticles Pr0.5Ca0.5MnO3(PCMO). On comparing our results with that bulk PCMO, find there is a likely destabilization charge ordering in PCMO. The investigation has been done particle sizes as small 15nm synthesized by polyol route. size reduction (by keeping chemical composition unchanged) reduces orthorhombic c axis preferentially thus distortion. to enhances ferromagnetic moment at low temperatures strongly...
We have shown, using high resolution x-ray diffraction studies of nanoparticles, that size reduction can lead to an arrest the temperature phase in perovskite materials, which prevents growth low needs a specific crystal structure for its stabilization. This has been shown context ∼15nm diameter nanocrystals La0.5Ca0.5MnO3, orthorhombic distortion at room freezes and, as consequence, charge order cannot set and ferromagnetic state sets higher is stabilized temperature.
In the spinel Co2SnO4, coexistence of ferrimagnetic ordering below TN ≃ 41 K followed by a spin glass state TSG 39 was proposed recently based on temperature dependence magnetization M(T) data. Here new measurements specific heat CP(T), ac-susceptibilities χ'(T) and χ''(T) measured at frequencies between 0.51 1.2 kHz, hysteresis loop parameters (coercivity HC(T) remanence MR(T)) in two differently prepared samples Co2SnO4 are reported. The presence Co2+ Sn4+ states is confirmed x-ray...