A5089114046- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Physics of Superconductivity and Magnetism
- Rare-earth and actinide compounds
- Organic and Molecular Conductors Research
- 2D Materials and Applications
- Iron-based superconductors research
- Geophysical and Geoelectrical Methods
- Perovskite Materials and Applications
- Magnetic Properties of Alloys
- Shape Memory Alloy Transformations
- Graphene and Nanomaterials Applications
- Machine Learning and Data Classification
- Catalytic Processes in Materials Science
- Bone and Dental Protein Studies
- Underwater Acoustics Research
- Phase-change materials and chalcogenides
- Periodontal Regeneration and Treatments
- Statistical Methods and Bayesian Inference
- Statistical Methods and Inference
- Artificial Intelligence in Healthcare
- Anomaly Detection Techniques and Applications
Lund University
2023-2025
MAX IV Laboratory
2023-2025
Saveetha University
2024-2025
Ramakrishna Mission Vivekananda Educational and Research Institute
2024
Paul Scherrer Institute
2014-2023
Swiss Light Source
2014-2023
Kyoto University
2018
ETH Zurich
2018
Japan Synchrotron Radiation Research Institute
2018
SPring-8
2018
The catalytic conversion of carbon dioxide (CO2) to methanol over Cu/ZnO catalysts is expected become valuable for recycling CO2. nature the Cu–Zn interplay remains a subject intense debate due many different Zn species encountered in catalysts. In this study, we designed catalyst by ion-exchanging Cu into CIT-6, crystalline microporous zincosilicate with BEA* topology. exhibited high and stable CO2 hydrogenation rate methanol. contrast, its aluminosilicate counterparts Cu-Beta CuZn-Beta...
ABSTRACT Objective This study aims to identify the proteins in hypomineralized second primary molars (HSPMs) and correlate their function Amelogenesis. HSPM is a qualitative defect of enamel with no clear etiology. Material Methods Total protein quantification was performed using Bradford Protein Assay, followed by electrophoretic separation samples 2D‐Gel electrophoresis proteins. Results The results from Assay unveiled five‐fold increase content HSPM. Proteins such as Dentin...
Aqueous processing offers an environmentally friendly alternative to conventional organic solvent-based methods for producing Ni-rich cathodes lithium-ion batteries (LIBs). However, interaction with water can drive phase recon-struction at the...
We investigated the crystal structure and lattice excitations of ternary intermetallic stannide ${\mathrm{Ca}}_{3}{\mathrm{Ir}}_{4}{\mathrm{Sn}}_{13}$ using neutron x-ray scattering techniques. For $T>{T}^{*}\ensuremath{\approx}38$ K, diffraction data can be satisfactorily refined space group $Pm\overline{3}n$. Below ${T}^{*}$, is modulated with a propagation vector $\stackrel{P\vec}{q}=(1/2,1/2,0)$. This may arise from merohedral twinning in which three tetragonal domains overlap to mimic...
Hexagonal ${\mathrm{YMnO}}_{3}$ is a prototype antiferromagnet which exhibits multiferroic behavior with the ferroelectric and magnetic transitions occurring at different temperatures. We observe an out-of-plane canting of ${\mathrm{Mn}}^{3+}$ moments using resonant x-ray diffraction (RXD) in single crystal this material. These canted result symmetry-forbidden (0,0,1) Bragg reflection, observed Mn ${L}_{2,3}$ absorption edges. also unexpected difference RXD spectral shapes Using ab initio...
faster turnaround times are just some of the benefits green synthesis ZnO NPs using plant extracts as opposed to chemical synthesis.The toxicity chemicals employed in create is also reduced.Due its reliability producing with tunable size and form, remains popular.NPs can be made huge quantities well. 10Therefore, choice approach relies on application desired features NPs, both processes have their pros downsides.
We performed ultrafast time-resolved near-infrared pump, resonant soft x-ray diffraction probe measurements to investigate the coupling between photoexcited electronic system and spin cycloid magnetic order in multiferroic $\mathrm{TbMn}{\mathrm{O}}_{3}$ at low temperatures. observe melting of long range antiferromagnetic excitation fluences with a decay time constant $22.3\ifmmode\pm\else\textpm\fi{}1.1\phantom{\rule{0.16em}{0ex}}\mathrm{ps}$, which is much slower than \ensuremath{\sim}1 ps...
Hybrid semiconductor-ferromagnetic insulator heterostructures are interesting due to their tunable electronic transport, self-sustained stray field, and local proximitized magnetic exchange. In this work, we present lattice-matched hybrid epitaxy of InAs/EuS analyze the atomic-scale structure characteristics. The Fermi level at interface is found be close InAs conduction band in gap EuS, thus preserving semiconducting properties. Both neutron X-ray reflectivity measurements show that overall...
In this work, we use ultrafast pump-probe nonresonant and resonant x-ray diffraction to track the periodic lattice distortion electronic charge density wave in 1T−TiSe2 upon optical excitation. We observe a fluence regime which deformation is strongly suppressed but related Se 4p orbital order remains mostly intact. Complete melting of both structural occurs four five times faster than expected from purely charge-screening process, suggesting structurally assisted weakening excitonic...
The correlation between electronic and crystal structures of 1T−TiSe2 in the charge-density wave (CDW) state is studied by x-ray diffraction order to clarify basic properties CDW state, transport properties, chirality. Three families reflections are used probe atomic displacements orbital asymmetry Se. Two distinct onset temperatures found: TCDW a lower T* indicative for an Se out-of-plane displacements. coincides with DC resistivity maximum proposed gyrotropic (chiral) structure. However,...
Using resonant soft X-ray techniques we follow the magnetic behavior of a strained epitaxial film CoCr2O4, type-II multiferroic. The is [110]-oriented, such that both ferroelectric and ferromagnetic moments can coexist in plane. circular dichroism (XMCD) used scattering transmission modes to probe magnetization Co Cr separately. measurements utilized excited optical luminescence from substrate. Resonant diffraction (RSXD) was study order low temperature phase. XMCD signals appear at same...
Orthorhombic rare-earth manganites, o-$R$MnO${}_{3}$ ($R$ is a cation or Y), are typical representatives of multiferroics in which ferroelectricity induced by magnetic order. They interest because their and ferroelectric properties can be strongly modified small external perturbations. Here, the authors use resonant nonresonant x-ray diffraction measurements, density functional theory, Monte Carlo simulations to investigate how manipulated using chemical pressure epitaxial strain. The...
X-ray magnetic circular and linear dichroism (XMCD XMLD) have been used to investigate the Fe response during spin reorientation transition (SRT) in TmFeO3. These experiments are complemented with resonant diffraction at Tm M5 edge study simultaneously induced order 4f shell behavior of orbitals through SRT. Comparing XMLD results neutron magnetization measurements on same sample indicate that SRT has an enhanced temperature range near surface region. This view is supported by soft x-ray...
We employ resonant soft x-ray diffraction to individually study the magnetic ordering of Mn and Tm sublattices in single-crystalline films orthorhombic $(o\text{\ensuremath{-}})\phantom{\rule{0.16em}{0ex}}\mathrm{TmMn}{\mathrm{O}}_{3}$. The same wave vector $(0\phantom{\rule{0.16em}{0ex}}q\phantom{\rule{0.16em}{0ex}}0)$ with $q\ensuremath{\approx}0.46$ is found for both ionic species, suggesting that familiar antiferromagnetic order ions induces a on unpaired $4f$ electrons. Indeed,...
Material properties can be controlled via strain, pressure, chemical composition, or dimensionality. Nickelates are particularly susceptible due to their strong variations of the electronic and magnetic on such external stimuli. Here, we analyze photoinduced dynamics in a single crystalline NdNiO3 film upon excitation across gap. Using time-resolved reflectivity resonant x-ray diffraction, show that pump pulse induces an insulator-to-metal transition, accompanied by melting charge order....
Abstract Magnetic ground states with peculiar spin textures, such as magnetic skyrmions and multifunctional domains are of enormous interest for the fundamental physics governing their origin well potential applications in emerging technologies. Of particular multiferroics, where sophisticated interactions between electric phenomena can be used to tailor several functionalities. We report direct observation a field induced long-wavelength spiral modulation chiral compound Ba $${}_{3}$$...
Multiferroic properties of orthorhombic HoMnO3 (Pbnm space group) are significantly modified by epitaxial compressive strain along the a-axis. We able to focus on effect solely a-axis using an YAlO3 (010) substrate, which has only a small lattice mismatch with other in-plane direction (the c-axis). strained and relaxed thin films compared those reported for bulk, found differ widely. A film exhibits bulk-like such as ferroelectricity below 25 K incommensurate antiferromagnetic order 39 K,...
Chiral multiferroic langasites have attracted attention due to their doubly chiral magnetic ground state within an enantiomorphic crystal. We report on a detailed resonant soft x-ray diffraction study of the ${\mathrm{Ba}}_{3}{\mathrm{TaFe}}_{3}{\mathrm{Si}}_{2}{\mathrm{O}}_{14}$ at Fe ${L}_{2,3}$ and oxygen $K$ edges. Below ${T}_{N}$ ($\ensuremath{\approx}27K$) we observe satellite reflections $(0,0,\ensuremath{\tau}), (0,0,2\ensuremath{\tau}), (0,0,3\ensuremath{\tau})$,...
We present a generalized multiferroic phase diagram for orthorhombic $R{\mathrm{MnO}}_{3}\phantom{\rule{4pt}{0ex}}(R=\mathrm{Gd}--\mathrm{Lu})$ based on coherently grown thin films. The magnetic order was identified by neutron-diffraction and resonant soft x-ray scattering experiments. For large $R$-ions $(R=\mathrm{Gd}--\mathrm{Dy})$, the transition temperature to long-range ordered antiferromagnetic is only weakly dependent $R$-ion radius, but decreases monotonically with decreasing radius...
Using the small angle neutron scattering (SANS) technique we investigated vortex lattice (VL) in mixed state of stannide superconductor Yb$_{3}$Rh$_{4}$Sn$_{13}$. We find a single domain VL slightly distorted hexagonal geometry for field strengths between 350 and 18500 G temperatures T = 0.05 6.5 K. observe clear in-plane rotation different magnetic directions relative to crystallographic axes. also that symmetry is energetically favorable Yb$_{3}$Rh$_{4}$Sn$_{13}$ external fields oriented...
We study the element-specific magnetic depth profiles of a ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}/{\text{La}}_{2/3}{\text{Ca}}_{1/3}{\text{MnO}}_{3}$ (YBCO/LCMO) superlattice using soft x-ray resonant reflectometry (XRMR). This allows us to proximity effect (MPE) that is observed at YBCO/LCMO interface, characterized by occurrence depleted layer on manganite side and an induced magnetization in YBCO. Using profiling capability XRMR, we show Cu moments...
Orthorhombic HoMnO3 is a multiferroic in which Mn antiferromagnetic order induces ferroelectricity. A second transition occurs within the phase, strong enhancement of ferroelectric polarization concomitantly to ordering Ho 4f magnetic moments. Using element selectivity resonant X-ray diffraction, we study 3d and We explicitly show that affected by transition. Based on azimuthal dependence (0 q 0) 1-q reflections, suggest similar previously observed for Tb TbMnO3, resembles an ac-cycloid....
We investigate the demagnetization dynamics of cycloidal and sinusoidal phases multiferroic ${\mathrm{TbMnO}}_{3}$ by means time-resolved resonant soft x-ray diffraction following excitation an optical pump. The use orthogonal linear polarizations provides information on contribution from different magnetic moment directions, which can be interpreted as signatures spin order order. Tracking these in time domain enables us to identify transient phase created intense photoexcitation electrons...