Evolution of ferromagnetic cluster in perovskite LaSrMnO nanocrystalline detected by EPR spectrum.

Electron paramagnetic resonance (EPR) studies were performed on LaSrMnO (LSMO) nanocrystalline together with the measurement of its magnetization. Various spectrum parameters including line width, effective g-value and double-integrated intensities have been analyzed in detail. We found nonlinear behavior occurred in the inverse susceptibility far above the Curie temperature T indicating short-range ferromagnetic (FM) clusters and Griffiths-like phase behavior in the paramagnetic (PM) phase.

Same effect of biquadratic exchange interaction and Heisenberg linear interaction in a spin spiral.

Monolayer (ML) NiCl exhibits a strong biquadratic exchange interaction between the first neighboring magnetic atoms (), as demonstrated by the spin spiral model in J. Ni , , 2021, , 247204. This interaction is crucial for stabilizing the ferromagnetic collinear order within the ML NiCl.

Tuning the size of skyrmion by strain at the Co/Pt interfaces.

Based on density functional theory calculations, we elucidated the tunability of the atomic structures and magnetic interactions of Co/Pt interface (one layer of hcp(0001) Co and three layers of fcc(111) Pt) and thus the skyrmion sizes using strain. The dispersion relations of the spin spiral in the opposite directions, E() and E(-), were evaluated based on generalized Bloch equations. Effective exchange coupling (EC) and Dzyaloshinsky-Moriya interaction (DMI) parameters between different neighbors and at different lattice constants were derived by fitting the resulting spin spiral dispersion E() to EC model with DMI and E()-E(-) formula, respectively.

Tricritical-point phase diagram in PrCuSn.

Tricritical phenomenon appearing in multiple phases is a fundamental and attractive issue in condensed-matter physics. In this work, a field-modulated tricritical phenomenon is realized in single-crystal PrCuSn. The magnetization under variable directions of field indicates strong magnetic anisotropy in PrCuSn, which reveals ferromagnetic coupling for//.

High-Temperature and Flexible Piezoelectric Sensors for Lamb-Wave-Based Structural Health Monitoring.

Piezoelectric sensors can be utilized in Lamb-wave-based structural health monitoring (SHM), which is an effective method for aircraft structural damage detection. However, due to the inherent stiffness, brittleness, weight, and thickness of piezoelectric ceramics, their applications in aircraft structures with complex curved surfaces are seriously restricted. Herein, we report a flexible, light-weight, and high-performance BaTiO:SmO/SrRuO/SrTiO/mica film sensor that can be used in high-temperature SHM of aircraft.

Two-dimensional magnetic interplay in the tensile-strained LaCoO thin films.

High-quality epitaxial LaCoO (LCO) thin films have been deposited on SrTiO (STO) substrates with pulsed laser deposition (PLD). We find that the LCO films undergo a typical ferromagnetic-paramagnetic (FM-PM) phase transition at ∼80 K. To understand the nature of magnetic phase transition, various methods, including the modified Arrott plot and critical isotherm analysis, were used to determine the critical exponents, which are β = 0.

Perovskite Transparent Conducting Oxide for the Design of a Transparent, Flexible, and Self-Powered Perovskite Photodetector.

Transparent and flexible electronic devices are highly desired to meet the great demand for next-generation devices that are lightweight, flexible, and portable. Transparent conducting oxides (TCOs), such as indium-tin oxide, serve as fundamental components for the design of transparent and flexible electronic devices. However, indium is rare and expensive.

Scaling of the magnetic entropy change in chiral helimagnetic YbNiAl.

Generally, magnetic anisotropy is a common feature of a layered magnetic material, the exploration of which plays a key role in understanding the intrinsic magnetic couplings. In this work, we have studied the field-induced magnetic transitions for layered YbNiAl as the external magnetic field is applied perpendicularly ([Formula: see text]) and parallel (H//c) to the c-axis. We find that two independent universal curves of magnetic entropy change [[Formula: see text]] can be fitted out for [Formula: see text] and H//c, respectively.

Spin-lattice correlation in Eu doped antiferromagnet TmFeO.

We report the physical properties of Eu-doped bulk TmFeO through X-ray diffraction, magnetic susceptibility (χ), Raman scattering and X-ray absorption spectroscopy (XAS) study, which shows a similar orthorhombic structure with the Pbnm space group as TmFeO. Magnetic measurement on Eu-doped TmFeO provides evidence for spin reorientations of Fe. Further, the Raman spectra of Eu doped TmFeO show significant changes in Raman modes as a function of temperature, which are evidence for strong spin-lattice interaction.

Critical phenomenon and phase diagram of Mn-intercalated layered MnNbS.

The magnetization of Mn-intercalated layered MnNbS single crystal has been systematically investigated. The angle-dependent magnetization ([Formula: see text], [Formula: see text], and [Formula: see text]) displays that the magnetization of MnNbS with [Formula: see text] is much stronger than that with H//c, but no magnetic anisotropy within the ab-plane. In addition, a field-induced magnetic phase transition is found when [Formula: see text].

Evolution of the intrinsic electronic phase separation in LaErSrMnO perovskite.

Magnetic and electronic transport properties of perovskite manganite LaErSrMnO have been thoroughly examined through the measurements of magnetization, electron paramagnetic resonance(EPR), and resistivity. It was found that the substitution of Er for La ions introduced the chemical disorder and additional strain in this sample. An extra resonance signal occurred in EPR spectra at high temperatures well above T gives a strong evidence of electronic phase separation(EPS).

Critical phenomenon of the near room temperature skyrmion material FeGe.

The cubic B20 compound FeGe, which exhibits a near room temperature skyrmion phase, is of great importance not only for fundamental physics such as nonlinear magnetic ordering and solitons but also for future application of skyrmion states in spintronics. In this work, the critical behavior of the cubic FeGe is investigated by means of bulk dc-magnetization. We obtain the critical exponents (β = 0.

Characteristics of traditional Chinese medicine use for children with allergic rhinitis: a nationwide population-based study.

Objectives: Allergic rhinitis (AR) is a common allergic disorder in children, some of whom seek complementary treatments, including acupuncture and Chinese herbs. Little, however, is known about the treatment of pediatric AR with traditional Chinese medicine (TCM). To characterize TCM use in pediatric AR, we conducted a nationwide population-based study.