Temperature Evolution of Magnon Propagation Length in TmFeO Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping.

The magnon propagation length, ⟨ξ⟩, of a ferro-/ferrimagnet (FM) is one of the key factors that controls the generation and propagation of thermally driven magnonic spin current in FM/heavy metal (HM) bilayer based spincaloritronic devices. For the development of a complete physical picture of thermally driven magnon transport in FM/HM bilayers over a wide temperature range, it is of utmost importance to understand the respective roles of temperature-dependent Gilbert damping (α) and effective magnetic anisotropy () in controlling the temperature evolution of ⟨ξ⟩. Here, we report a comprehensive investigation of the temperature-dependent longitudinal spin Seebeck effect (LSSE), radio frequency transverse susceptibility, and broad-band ferromagnetic resonance measurements on TmFeO (TmIG)/Pt bilayers grown on different substrates.

Large Thermo-Spin Effects in Heusler Alloy-Based Spin Gapless Semiconductor Thin Films.

Recently, Heusler alloy-based spin gapless semiconductors (SGSs) with high Curie temperature () and sizable spin polarization have emerged as potential candidates for tunable spintronic applications. We report comprehensive investigation of the temperature-dependent ANE and intrinsic longitudinal spin Seebeck effect (LSSE) in CoFeCrGa thin films grown on MgO substrates. Our findings show that the anomalous Nernst coefficient for the MgO/CoFeCrGa (95 nm) film is ≈1.

Intergranular Spin Dependent Tunneling Dominated Magnetoresistance in Helimagnetic Manganese Phosphide Thin Films.

Helical magnets are emerging as a novel class of materials for spintronics and sensor applications; however, research on their charge- and spin-transport properties in a thin film form is less explored. Herein, we report the temperature and magnetic field-dependent charge transport properties of a highly crystalline MnP nanorod thin film over a wide temperature range (2 K < < 350 K). The MnP nanorod films of ~100 nm thickness were grown on Si substrates at 500 °C using molecular beam epitaxy.

Competing Magnetic Interactions and Field-Induced Metamagnetic Transition in Highly Crystalline Phase-Tunable Iron Oxide Nanorods.

The inherent existence of multi phases in iron oxide nanostructures highlights the significance of them being investigated deliberately to understand and possibly control the phases. Here, the effects of annealing at 250 °C with a variable duration on the bulk magnetic and structural properties of high aspect ratio biphase iron oxide nanorods with ferrimagnetic FeO and antiferromagnetic α-FeO are explored. Increasing annealing time under a free flow of oxygen enhanced the α-FeO volume fraction and improved the crystallinity of the FeO phase, identified in changes in the magnetization as a function of annealing time.

Enhanced Magnetism and Anomalous Hall Transport through Two-Dimensional Tungsten Disulfide Interfaces.

The magnetic proximity effect (MPE) has recently been explored to manipulate interfacial properties of two-dimensional (2D) transition metal dichalcogenide (TMD)/ferromagnet heterostructures for use in spintronics and valleytronics. However, a full understanding of the MPE and its temperature and magnetic field evolution in these systems is lacking. In this study, the MPE has been probed in Pt/WS/BPIO (biphase iron oxide, FeO and α-FeO) heterostructures through a comprehensive investigation of their magnetic and transport properties using magnetometry, four-probe resistivity, and anomalous Hall effect (AHE) measurements.

Effects of surface patterning and topography on the cellular functions of tissue engineered scaffolds with special reference to 3D bioprinting.

The extracellular matrix (ECM) of the tissue organ exhibits a topography from the nano to micrometer range, and the design of scaffolds has been inspired by the host environment. Modern bioprinting aims to replicate the host tissue environment to mimic the native physiological functions. A detailed discussion on the topographical features controlling cell attachment, proliferation, migration, differentiation, and the effect of geometrical design on the wettability and mechanical properties of the scaffold are presented in this review.

Emergent magnetism and exchange bias effect in iron oxide nanocubes with tunable phase and size.

We report a systematic investigation of the magnetic properties including the exchange bias (EB) effect in an iron oxide nanocube system with tunable phase and average size (10, 15, 24, 34, and 43 nm). X-ray diffraction and Raman spectroscopy reveal the presence of FeO, FeO, and-FeOphases in the nanocubes, in which the volume fraction of each phase varies depending upon particle size. While the FeOphase is dominant in all and tends to grow with increasing particle size, the FeO phase appears to coexist with the FeOphase in 10, 15, and 24 nm nanocubes but disappears in 34 and 43 nm nanocubes.

Spin Seebeck Effect in Iron Oxide Thin Films: Effects of Phase Transition, Phase Coexistence, And Surface Magnetism.

Understanding the effects of phase transition, phase coexistence, and surface magnetism on the longitudinal spin Seebeck effect (LSSE) in a magnetic system is essential to manipulate the spin to charge current conversion efficiency for spincaloritronic applications. We aim to elucidate these effects by performing a comprehensive study of the temperature dependence of the LSSE in biphase iron oxide (BPIO = α-FeO + FeO) thin films grown on Si (100) and AlO (111) substrates. A combination of a temperature-dependent anomalous Nernst effect (ANE) and electrical resistivity measurements show that the contribution of the ANE from the BPIO layer is negligible in comparison to the intrinsic LSSE in the Si/BPIO/Pt heterostructure, even at room temperature.

Broadband Electron Spin Resonance Study in a SrFeMoO Double Perovskite.

We report broadband magnetic resonance in polycrystalline SrFeMoO measured over the wide temperature ( = 10-370 K) and frequency ( = 2-18 GHz) ranges. SrFeMoO was synthesized by the sol-gel method and found to be ferromagnetic below = 325 K. A coplanar waveguide-based broadband spectrometer was used to record the broadband electron spin resonance (ESR) both in frequency sweep and field sweep modes.

Influence of magnetic field on electrical and thermal transport in the hole doped ferromagnetic manganite: LaNaMnO.

We report the magnetization (), magnetostriction, electrical resistivity (), thermal conductivity () and thermopower () of polycrystalline LaNaMnO over a wide temperature range of 5 to 360 K. This sample undergoes a paramagnetic to ferromagnetic transition around = 274 K and electrical resistivity shows an insulator-metal transition around = 292 K. The sign of thermopower is positive in the entire temperature range which indicates that majority charge carriers are holes.

Electrospun chitosan/polycaprolactone-hyaluronic acid bilayered scaffold for potential wound healing applications.

Fabrication of mechanically stable, biocompatible bilayered polymeric scaffold consisting of chitosan(CS)/polycaprolactone(PCL) and hyaluronic acid(HA) using less toxic solvent system is presented in this study. Electrospinning technique to make the scaffold was used followed by morphological, physiochemical and mechanical characterizations. Average fiber diameter of CS/PCL-HA bilayered scaffold was found 362.