Results 331 to 340 of about 618,172 (384)

Tweezing of Magnetic and Non‐Magnetic Objects with Magnetic Fields

Advanced Materials, 2017
Although strong magnetic fields cannot be conveniently “focused” like light, modern microfabrication techniques enable preparation of microstructures with which the field gradients – and resulting magnetic forces – can be localized to very small dimensions.
Timonen, Jaakko V I, Grzybowski, Bartosz, A.   +2 more
openaire   +3 more sources

Covalent magnetism and magnetic impurities

Journal of Physics: Condensed Matter, 2013
We use the model of covalent magnetism and its application to magnetic insulators applied to the case of insulating carbon doped BaTiO3. Since the usual Stoner mechanism is not applicable we study the possibility of the formation of magnetic order based on a mechanism favoring singly occupied orbitals.
C, Gruber, P O, Bedolla, P, Mohn
openaire   +2 more sources

Ultrafast phononic switching of magnetization

Nature Physics, 2020
Identifying efficient pathways to control and modify the order parameter of a macroscopic phase in materials is an important ongoing challenge. One way to do this is via the excitation of a high-frequency mode that couples to the order, and this is the ...
A. Stupakiewicz, C. Davies, K. Szerenos, D. Afanasiev, K. Rabinovich, A. Boris, A. Caviglia, A. Kimel, A. Kirilyuk   +8 more
semanticscholar   +1 more source

Recent Advances in Magnetization Roasting of Refractory Iron Ores: A Technological Review in the Past Decade

Mineral Processing and Extractive Metallurgy Review, 2020
Improving utilization efficiency of refractory iron ore resources is a common theme for the sustainable development of the world’s steel and iron industry.
Jianwen Yu, Yue-xin Han, Yan-jun Li, Peng Gao   +3 more
semanticscholar   +1 more source

Magnetization switching by spin-orbit torque in an antiferromagnet-ferromagnet bilayer system.

Nature Materials, 2015
Spin-orbit torque (SOT)-induced magnetization switching shows promise for realizing ultrafast and reliable spintronics devices. Bipolar switching of the perpendicular magnetization by the SOT is achieved under an in-plane magnetic field collinear with an
S. Fukami, Chaoliang Zhang, S. DuttaGupta, A. Kurenkov, H. Ohno   +4 more
semanticscholar   +1 more source

Persistent magnetic coherence in magnets

Nature Materials
When excited, the magnetization in a magnet precesses around the field in an anticlockwise manner on a timescale governed by viscous magnetization damping, after which any information carried by the initial actuation seems to be lost. This damping appears to be a fundamental bottleneck for the use of magnets in information processing.
T. Makiuchi, T. Hioki, H. Shimizu, K. Hoshi, M. Elyasi, K. Yamamoto, N. Yokoi, A. A. Serga, B. Hillebrands, G. E. W. Bauer, E. Saitoh   +10 more
openaire   +2 more sources

Localized Magnetic Polaritons in the Magnetic Superlattice with Magnetic Impurity

Physica Scripta, 2004
The magnetic polaritons localized at the magnetic impurity layer in magnetic superlattice composed of the alternating ferromagnetic and nonmagnetic layers are investigated in the framework of the electromagnetic wave theory in the Voigt geometry. The general dispersion relation for localized magnetic polaritons is derived in the long-wavelength limit ...
openaire   +1 more source

Switching of perpendicular magnetization by spin-orbit torques in the absence of external magnetic fields.

Nature Nanotechnology, 2013
Magnetization switching by current-induced spin-orbit torques is of great interest due to its potential applications in ultralow-power memory and logic devices. The switching of ferromagnets with perpendicular magnetization is of particular technological
Guoqiang Yu, P. Upadhyaya, Yabin Fan, J. G. Alzate, Wanjun Jiang, Kin L. Wong, S. Takei, S. Bender, Li-Te Chang, Ying Jiang, M. Lang, Jianshi Tang, Yong Wang, Y. Tserkovnyak, P. Amiri, Kang L. Wang   +15 more
semanticscholar   +1 more source

Magnetic Monopoles in a Magnetic Universe

1984
Large scale coherence of a cosmological magnetic field, independently of its strength, is incompatible with any detectable monopole flux. Consequently, the controversial evidence1 of a coherent magnetic field up to a redshift z ≃ 2 infers the most severe cosmological bound on present number density (no) and fluxes (F) of magnetic monopoles: \( n_O < 2 \
openaire   +2 more sources

Magnetism and Magnetic Fields

2012
The study of magnetism and magnetic fields readily follows the study of electricity and is normally a second-semester topic in a first-year physics course. One of the difficulties that a teacher may encounter is that students often confuse magnetic poles with electric charges.
Jan Mader, Mary Winn
openaire   +1 more source