Peripheral Blood Flow Velocity and Peripheral Pulse Wave Velocity Measured Using a Clip-type Pulsimeter Equipped with a Permanent Magnet and a Hall Device

The effects of manganese substitution on the crystallographic and magnetic properties of Li-Zn-Cu ferrite, Li 0.5 Zn 0.2 Cu 0.4 Mn x Fe 2.1-x O 4 (0.0 ≤ x ≤ 0.8), were investigated. Ferrites were synthesized via a conventional ceramic method. We confirmed the formation of crystallized particles using X-ray diffraction, field emission scanning electron microscopy and Mössbauer spectroscopy. All of the samples showed a single phase with a spinel structure, and the lattice constants linearly decreased as the substituted manganese content increased, and the particle size of the samples also somewhat decreased as the doped manganese content increased. All the Mössbauer spectra can be fitted with two Zeeman sextets, which are the typical spinel ferrite spectra of Fe 3+ with A-and B-sites, and one doublet. The cation distribution was determined from the variation of the Mössbauer parameters and of the absorption area ratio. The magnetic behavior of the samples showed that an increase in manganese content led to a decrease in the saturation magnetization, whereas the coercivity was nearly constant throughout. The maximum saturation magnetization was 73.35 emu/g at x = 0.0 in Li 0.5 Zn 0.2 Cu 0.4 Mn x Fe 2.1-x O 4 .

Effects of Mn Substitution on Crystallographic and Magnetic Properties of Li-Zn-Cu Ferrites

Lee¹,

Choi²,

Chae³

2014

The First-principles Calculations on the Half-metallic Properties of (001) and (110) Surfaces of Zinc-blende YC

Białek¹,

Lee²

2015

We investigated the half-metallicity and magnetism at the (001) and (110) surfaces of YC in zinc-blende structure by using the all-electron full-potential linearized augmented plane wave method within the generalized gradient approximation. From the calculated local density of states, we found that neither (001) nor (110) surface preserves the half-metallicity. While the magnetic moment of Y atom in the YC bulk is 0.116 µ B , it is 0.057 µ B at the topmost layer of Y-terminated (001) surface. On the contrary, C-terminated (001) YC surface exhibits stronger magnetism than the bulk structure; the calculated magnetic moment on topmost C atom is 1.084 µ B , while that of C atom in the bulk structure is 0.423 µ B . The magnetic properties of the non-polar (110) YC surface are slightly enhanced as compared with the bulk structure.

Monte Carlo Investigation of Spatially Adaptable Magnetic Behavior in Stretchable Uniaxial Ferromagnetic Monolayer Film

Laosiritaworn¹,

Laosiritaworn²

2015

In this work, Monte Carlo simulation was employed to model the stretchable Ising monolayer film to investigate the effect of the spatial distance variation among magnetic atoms on magnetic behavior of the film. The exchange interaction was considered as functions of initial interatomic distance and the stretched distance (or the strain). Following Bethe-Slater picture, the magnetic exchange interaction took the Lennard-Jones potential-like function. Monte Carlo simulations via the Wolff and Metropolis algorithms were used to update the spin systems, where equilibrium and dynamic magnetic profiles were collected. From the results, the strain was found to have strong influences on magnetic behavior, especially the critical behavior. Specifically, the phase transition point was found to either increase or decrease depending on how the exchange interaction shifts (i.e. towards or away from the maximum value). In addition, empirical functions which predict how the critical temperatures scale with initial interatomic distance and the strain were proposed, which provides qualitatively view how to fine tune the magnetic critical point in monolayer film using the substrate modification induced strain.