Results 81 to 90 of about 13,630 (113)

Seiberg–Witten map and quantum phase effects for neutral Dirac particle on noncommutative plane

Physics Letters B, 2016
We provide a new approach to study the noncommutative effects on the neutral Dirac particle with anomalous magnetic or electric dipole moment on the noncommutative plane.
Kai Ma, Jian-Hua Wang, Huan-Xiong Yang
doaj   +1 more source

Noncollinear Magnetism in Fe3O4 Induced via Site‐Selective Rare‐Earth Substitution Boosting Its Saturation Magnetization

Small, Volume 21, Issue 13, April 2, 2025.
This study explores the site‐selective Eu3+substitution within Fe3O4 thin films at the Fe tetrahedral sites to enhance magnetic properties, employing DFT calculations and experimental investigations. The total magnetic moment of Eu3+, parallel to those of the octahedral Fe2+ and Fe3+ but opposite to that of the tetrahedral Fe3+, positively contributed ...
Haining Li, Masaki Kobayashi, Sonju Kou, Md Shamim Sarker, E M K Ikball Ahamed, Kohei Yamagami, Tetsuya Fukushima, Kaijie Ma, Shuting Ma, Takahito Takeda, Ryo Okano, M. Hussein N. Assadi, Hiroyasu Yamahara, Hiroshi Katayama‐Yoshida, Hitoshi Tabata, Munetoshi Seki   +15 more
wiley   +1 more source

Slow True Polar Wander Around Varying Equatorial Axes Since 320 Ma

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract True polar wander (TPW), the rotation of the solid Earth relative to the spin axis, is driven by changes in the Earth's moment of inertia induced by mantle convection and may have influenced past climate and life. Long‐term TPW is typically inferred from large polar shifts in paleomagnetic apparent polar wander paths or computed directly by ...
Bram Vaes, Douwe J. J. van Hinsbergen
wiley   +1 more source

A search for neutron to mirror-neutron oscillations using the nEDM apparatus at PSI

Physics Letters B, 2021
It has been proposed that there could be a mirror copy of the standard model particles, restoring the parity symmetry in the weak interaction on the global level. Oscillations between a neutral standard model particle, such as the neutron, and its mirror
C. Abel, N.J. Ayres, G. Ban, G. Bison, K. Bodek, V. Bondar, E. Chanel, P.-J. Chiu, C. Crawford, M. Daum, R.T. Dinani, S. Emmenegger, P. Flaux, L. Ferraris-Bouchez, W.C. Griffith, Z.D. Grujić, N. Hild, K. Kirch, H.-C. Koch, P.A. Koss, A. Kozela, J. Krempel, B. Lauss, T. Lefort, A. Leredde, P. Mohanmurthy, O. Naviliat-Cuncic, D. Pais, F.M. Piegsa, G. Pignol, M. Rawlik, D. Rebreyend, I. Rienäcker, D. Ries, S. Roccia, D. Rozpedzik, P. Schmidt-Wellenburg, N. Severijns, J. Thorne, A. Weis, E. Wursten, J. Zejma, G. Zsigmond   +42 more
doaj  

Effects of Fine Spectral Structure of Chorus Emissions on Nonlinear Scattering and Acceleration of Radiation Belt Electrons

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract Whistler‐mode chorus waves play a crucial role in accelerating electrons in Earth's outer radiation belt to relativistic and ultrarelativistic energies. While this electron evolution is typically modeled using a diffusion approximation for scattering, high‐amplitude chorus waves induce nonlinear resonant effects that challenge this approach on
Miroslav Hanzelka, Yuri Shprits, Dedong Wang, Bernhard Haas, Ondřej Santolík, Longzhi Gan   +5 more
wiley   +1 more source

Topographic Drag at the Core‐Mantle Interface

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract The length of day variations with periods from five to one hundred years are mainly due to core‐mantle interactions. Assuming a differential velocity between the core and the mantle, we investigate the pressure coupling on a core‐mantle boundary (CMB) interface with topography. Including rotation, buoyancy, and magnetic effects in local models
R. Monville, D. Cébron, D. Jault
wiley   +1 more source

Implementation of the frozen-spin technique for the search for a muon electric dipole moment

Journal of Instrumentation
Applying the frozen-spin technique in a compact 3 T solenoid will enable a search for the muon electric dipole moment (EDM) with unprecedented sensitivity, improving upon the current direct limit by approximately a factor of 1000.
T. Hume, R. Chakraborty, A. Doinaki, C. Dutsov, M. Giovannozzi, K. Michielsen, L. Morvaj, A. Papa, P. Schmidt-Wellenburg, David Stäger   +9 more
semanticscholar   +1 more source

Multi‐Scale Geophysical Imaging of a Hydrothermal System in Yellowstone National Park, USA

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Little is known about the local plumbing systems that fuel Yellowstone's famous hot springs, geysers and mud pots. A multi‐method, multi‐scale geophysical investigation was carried out in the Obsidian Pool Thermal Area (OPTA) to: (a) delineate the lateral extent of the hydrothermal area and associated surface features; (b) estimate the ...
Sylvain Pasquet, W. Steven Holbrook, Bradley J. Carr, Neil Terry, Martin A. Briggs, Carol A. Finn, Paul A. Bedrosian, Esben Auken, Jesper Pedersen, Pradip Maurya, Kenneth W. W. Sims   +10 more
wiley   +1 more source

The simplest massive S-matrix: from minimal coupling to black holes

Journal of High Energy Physics, 2019
In this paper, we explore the physics of electromagnetically and gravitationally coupled massive higher spin states from the on-shell point of view. Starting with the three-point amplitude, we focus on the simplest amplitude characterized by matching to ...
Ming-Zhi Chung, Yu-tin Huang, Jung-Wook Kim, Sangmin Lee   +3 more
doaj   +1 more source

Paleomagnetic Secular Variation of Early Middle Miocene Volcanics From Vogelsberg (Germany)

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract The Earth's magnetic field significantly changed its rate of polarity reversals over the past 200 Myr; yet it remains controversial whether these drastic changes—from a stable state of polarity during the Cretaceous Normal Superchron to more than 10 events per Myr during the Jurassic—are accompanied with similar changes in the directional ...
Y. Chi, F. Lhuillier
wiley   +1 more source