Profile and predictors of high school teachers' attitude and self-efficacy in utilizing ICT: an investigation from Indonesia.

This study investigated the relationship among several predictors that could influence high school teachers' attitudes and self-efficacy in utilizing ICT, such as length of computer use, computer competencies, computer access, computer training, and frequency of using computer programs. Quantitative study through descriptive and correlational design has been used to answer the hypothesis of this study. A total of 345 active high school teachers participated in this study.

Giant field-like torque by the out-of-plane magnetic spin Hall effect in a topological antiferromagnet.

Spin-orbit torques (SOT) enable efficient electrical control of the magnetic state of ferromagnets, ferrimagnets and antiferromagnets. However, the conventional SOT has severe limitation that only in-plane spins accumulate near the surface, whether interpreted as a spin Hall effect (SHE) or as an Edelstein effect. Such a SOT is not suitable for controlling perpendicular magnetization, which would be more beneficial for realizing low-power-consumption memory devices.

X-ray study of ferroic octupole order producing anomalous Hall effect.

Recently found anomalous Hall, Nernst, magnetooptical Kerr, and spin Hall effects in the antiferromagnets MnX (X = Sn, Ge) are attracting much attention for spintronics and energy harvesting. Since these materials are antiferromagnets, the origin of these functionalities is expected to be different from that of conventional ferromagnets. Here, we report the observation of ferroic order of magnetic octupole in MnSn by X-ray magnetic circular dichroism, which is only predicted theoretically so far.

Anomalous transport due to Weyl fermions in the chiral antiferromagnets MnX, X = Sn, Ge.

The recent discoveries of strikingly large zero-field Hall and Nernst effects in antiferromagnets MnX (X = Sn, Ge) have brought the study of magnetic topological states to the forefront of condensed matter research and technological innovation. These effects are considered fingerprints of Weyl nodes residing near the Fermi energy, promoting MnX (X = Sn, Ge) as a fascinating platform to explore the elusive magnetic Weyl fermions. In this review, we provide recent updates on the insights drawn from experimental and theoretical studies of MnX (X = Sn, Ge) by combining previous reports with our new, comprehensive set of transport measurements of high-quality MnSn and MnGe single crystals.

Scanning tunneling microscopy on cleaved MnSn(0001) surface.

We have studied in-situ cleaved (0001) surfaces of the magnetic Weyl semimetal MnSn by low-temperature scanning tunneling microscopy and spectroscopy (STM/S). It was found that freshly cleaved MnSn surfaces are covered with unknown clusters, and the application of voltage pulses in the tunneling condition was needed to achieve atomically flat surfaces. STM topographs taken on the flat terrace show a bulk-terminated 1 × 1 honeycomb lattice with the Sn site brightest.

Publisher Correction: Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet.

In this Letter, the formatting of some of the crystallographic axes was incorrect. This has been corrected online.

Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet.

The spin Hall effect (SHE) achieves coupling between charge currents and collective spin dynamics in magnetically ordered systems and is a key element of modern spintronics. However, previous research has focused mainly on non-magnetic materials, so the magnetic contribution to the SHE is not well understood. Here we show that antiferromagnets have richer spin Hall properties than do non-magnetic materials.

Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal.

When a polarized light beam is incident upon the surface of a magnetic material, the reflected light undergoes a polarization rotation. This magneto-optical Kerr effect (MOKE) has been intensively studied in a variety of ferro- and ferrimagnetic materials because it provides a powerful probe for electronic and magnetic properties as well as for various applications including magneto-optical recording. Recently, there has been a surge of interest in antiferromagnets (AFMs) as prospective spintronic materials for high-density and ultrafast memory devices, owing to their vanishingly small stray field and orders of magnitude faster spin dynamics compared to their ferromagnetic counterparts.