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The dynamic magnetic susceptibility of magnetic materials near ferromagnetic resonance (FMR) is very important in interpreting dc-voltage in electrical detection of FMR. Based on the causality principle and the assumption that the usual…

Mesoscale and Nanoscale Physics · Physics 2015-12-08 Yin Zhang , X. S. Wang , H. Y. Yuan , S. S. Kang , H. W. Zhang , X. R. Wang

In hopping magnetoresistance of doped insulators, an applied magnetic field shrinks the electron (hole) s-wave function of a donor or an acceptor and this reduces the overlap between hopping sites resulting in the positive magnetoresistance…

Materials Science · Physics 2015-05-30 Alexandre S. Alexandrov , Valentin A. Dediu , Victor V. Kabanov

Topological spin textures, such as a skyrmion crystal, are a source of unusual physical phenomena owing to the interplay between magnetism and topology. Since physical phenomena depend on the topological property and the symmetry of…

Strongly Correlated Electrons · Physics 2023-02-01 Ryota Yambe , Satoru Hayami

Misoriented bilayer graphene with commensurate angles shows unique magneto-optical properties. The optical absorption spectra of such a system strongly depend on the angle of rotation. For a general commensurate twist angle the absorption…

Mesoscale and Nanoscale Physics · Physics 2011-03-01 Vadim M. Apalkov , Tapash Chakraborty

A new theory is developed for the magnetoelectric (ME) coupling in a symmetric 2-2 ME laminate having a representative piezoelectric crystal (PMN-PT) particularly with anisotropic piezoelectric properties. Considering the average field…

The response of composite Fermions to large wavevector scattering has been studied through phonon drag measurements. While the response retains qualitative features of the electron system at zero magnetic field, notable discrepancies…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 S. Zelakiewicz , H. Noh , T. J. Gramila , L. N. Pfeiffer , K. W. West

The investigations of the reactive magnetron depositing of the stoichiometric coatings metal-metalloid were done. The dependences between sputtering parameters of a target and processes of plasmochemical formation on the surface of sample…

Materials Science · Physics 2022-07-28 A. Sagalovych , S. Dudnik , V. Sagalovych

We consider magnetostriction in magnetic materials. Starting from a microscopic lattice model of the magneto-elastic coupling, we derive the continuum magnetostriction Hamiltonian in cubic ferromagnets and antiferromagnets. In ferromagnets,…

Mesoscale and Nanoscale Physics · Physics 2018-10-04 Haakon T. Simensen , Roberto E. Troncoso , Arne Brataas

Random hyperfine fields are essential to mechanisms of low-field magnetoresistance in organic semiconductors. Recent experiments have shown that another type of random field --- fringe fields due to a nearby ferromagnet --- can also…

Mesoscale and Nanoscale Physics · Physics 2013-04-12 Nicholas J. Harmon , Ferran Macià , Fujian Wang , Markus Wohlgenannt , Andrew D. Kent , Michael E. Flatté

Several aspects of the magnetospheric physics of magnetars are summarized, including: GeV and hard X-ray emissions of magnetars, timing behaviors during magnetar outburst (soft X-ray observations), optical/IR observations of magnetars,…

High Energy Astrophysical Phenomena · Physics 2023-09-12 H. Tong

The functioning of the human brain, nervous system and heart is based on the conduction of electrical signals. These electrical signals also create magnetic fields which extend outside the human body. Highly sensitive magnetometers, such as…

Medical Physics · Physics 2022-12-07 Kasper Jensen , Bo Hjorth Bentzen , Eugene S. Polzik

The physics of ferromagnetic doped manganites, such as \chem{La_{1-x}Ca_xMnO_3} with $x\approx0.2$--0.4, is reviewed. The concept of double exchange is discussed within the general framework of itinerant electron magnetism. The new feature…

Strongly Correlated Electrons · Physics 2015-06-24 D. M. Edwards

Element-specific spectroscopies using synchrotron-radiation can provide unique insights into materials properties. The recently developed technique of X-ray detected ferromagnetic resonance (XFMR) allows studying the magnetization dynamics…

Materials Science · Physics 2023-05-17 Gerrit van der Laan , Thorsten Hesjedal

Recent data reported on the magneto-electric coupling,{\alpha}, of hexaferrite materials is very high, and they have the potential to impact future technologies in a major way. The fundamental question addressed in this paper is what does…

Materials Science · Physics 2014-04-23 Carmine Vittoriaa , Somu Sivasubramanianb , Allan Widomc

The detection of optical/infrared counterparts to Anomalous X-ray Pulsars (AXPs) has greatly increased our understanding of these systems. Models for the AXP phenomenon were based upon their X-ray emission, and all but the magnetar model…

Astrophysics · Physics 2007-05-23 Martin Durant , Marten H. van Kerkwijk , Ferdi Hulleman

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…

In this study, the impurity concentration and magnetic response of nine highly oriented pyrolytic graphite (HOPG) samples with different grades and from different providers were determined using ion beam microscopy and SQUID magnetometry.…

Materials Science · Physics 2014-06-23 D. Spemann , P. Esquinazi , A. Setzer , W. Böhlmann

Newborn, strongly magnetized neutron stars (so-called magnetars) surrounded by their stellar or merger ejecta are expected to be sources of ultrahigh-energy neutrinos via decay of mesons produced in hadronic interactions of protons which…

High Energy Astrophysical Phenomena · Physics 2020-11-11 Jose Alonso Carpio , Kohta Murase , Mary Hall Reno , Ina Sarcevic , Anna Stasto

The magneto-optic Voigt effect is observed in a synthetic diamond membrane with a substitutional nitrogen defect concentration in the order of 200 ppm and a nitrogen-vacancy defect sub-ensemble generated through neutron irradiation and…

Mesoscale and Nanoscale Physics · Physics 2020-04-07 Haitham A. R. El-Ella , Kristian H. Rasmussen , Alexander Huck , Ulrik L. Andersen , Ilya P. Radko

The magnetic susceptibility of underdoped yttrium and lanthanum cuprates is interpreted based on the self-consistent solution of the t-J model of a Cu-O plane. The calculations reproduce correctly the frequency dependencies of the…

Strongly Correlated Electrons · Physics 2007-05-23 A. Sherman
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