Results 31 to 40 of about 284,345 (342)

CMB anisotropies due to cosmological magnetosonic waves [PDF]

, 2006
We study scalar mode perturbations (magnetosonic waves) induced by a helical stochastic cosmological magnetic field and derive analytically the corresponding cosmic microwave background (CMB) temperature and polarization anisotropy angular power spectra.
Bharat Ratra, D. V. Deriagin, E. M. Lifshitz, E. M. Lifshitz, H. Kodama, I. D. Novikov, I. D. Novikov, I. S. Gradshteyn, J. P. Vallée, K. Subramanian, M. Abramowitz, M. Lesieur, N. Krall, P. J. E. Peebles, R. Durrer, Tina Kahniashvili   +15 more
core   +2 more sources

Magnetic anisotropy in itinerant magnets

Journal of Applied Physics, 2010
The structural dependence of the magnetocrystalline anisotropy of itinerant permanent magnets (or nanostructures of iron-series 3d elements) is investigated by model and tight-binding calculations. Magnetic nanostructures yield strong oscillations of the anisotropy as a function of the number of d electrons per atom, which can be tuned by alloying ...
Skomski, Ralph, Kashyap, Arti, Solanki, A., Enders, Axel, Sellmyer, David J.   +4 more
openaire   +2 more sources

Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption

Nature Communications
Soft magnetic materials with flake geometry can provide shape anisotropy for breaking the Snoek limit, which is promising for achieving high-frequency ferromagnetic resonances and microwave absorption properties.
Rongzhi Zhao, Tong Gao, Yixing Li, Zhuo Sun, Zhengyu Zhang, Lianze Ji, Chenglong Hu, Xiaolian Liu, Zhenhua Zhang, Xuefeng Zhang, Gaowu Qin   +10 more
doaj   +1 more source

Perturbative calculations of quantum spin tunneling in effective spin systems with a transversal magnetic field and transversal anisotropy

New Journal of Physics, 2017
We present a perturbative approach for the resonant tunnel splittings of an arbitrary effective single spin system. The Hamiltonian of such a system contains a uniaxial anisotropy, a transversal magnetic field and a second-order transversal anisotropy ...
M Krizanac, E Y Vedmedenko, R Wiesendanger   +2 more
doaj   +1 more source

Continuous tunable lateral magnetic anisotropy in La0.67Ca0.33MnO3/SrRuO3 superlattices by stacking period-modulation

AIP Advances, 2021
Effective control of magnetic anisotropy is important for developing spintronic devices. In this work, we performed a case study of stacking periods (N)-mediated reorientation of lateral magnetic anisotropy in ultrathin La0.67Ca0.33MnO3/SrRuO3 ...
Lili Qu, Da Lan, Kexuan Zhang, Enda Hua, Binghui Ge, Liqiang Xu, Feng Jin, Guanyin Gao, Lingfei Wang, Wenbin Wu   +9 more
doaj   +1 more source

Ferromagnetic resonance study of Co/Pd/Co/Ni multilayers with perpendicular anisotropy irradiated with Helium ions

, 2010
We present a ferromagnetic resonance (FMR) study of the effect of Helium ion irradiation on the magnetic anisotropy, the linewidth and the Gilbert damping of a Co/Ni multilayer coupled to Co/Pd bilayers.
Beaujour, Jean-Marc L., Fullerton, Eric E., Kent, Andrew D., Ravelosona, Dafine, Tudosa, Ioan   +4 more
core   +1 more source

Association of Corticospinal Tract Asymmetry With Ambulatory Ability After Intracerebral Hemorrhage

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Ambulatory ability after intracerebral hemorrhage (ICH) is important to patients. We tested whether asymmetry between ipsi‐ and contra‐lesional corticospinal tracts (CSTs) assessed by diffusion tensor imaging (DTI) is associated with post‐ICH ambulation.
Yasmin N. Aziz, Carl D. Langefeld, Mary E. Comeau, Miranda C. Marion, Tyler P. Behymer, Lee A. Gilkerson, Padmini Sekar, Weihong Yuan, Vivek Khandwala, Brady J. Williamson, Thomas Maloney, Achala Vagal, Pierce Boyne, Kari Dunning, Matthew L. Flaherty, Steven J. Kittner, Prachi Mehndiratta, Gunjan Y. Parikh, Michael L. James, David Roh, Fernando D. Testai, Farhaan S. Vahidy, James Thornton, Ranjit Bagga, Daniel Woo, Stacie L. Demel   +25 more
wiley   +1 more source

Determining magnetic properties of high entropy alloys by molar volume difference predicted by machine learning

AIP Advances
Magnetic high entropy alloys (HEAs) have attracted intensive attention for applications in functional devices, ascribed to the vast composition space for designing properties.
Min Lin, Rongzhi Zhao, Yijun Liao, Yixing Li, Xuefeng Zhang   +4 more
doaj   +1 more source

Renormalization of the tunnel splitting in a rotating nanomagnet

, 2010
We study spin tunneling in a magnetic nanoparticle with biaxial anisotropy that is free to rotate about its anisotropy axis. Exact instanton of the coupled equations of motion is found that connects degenerate classical energy minima.
A. R. Edmonds, E. M. Chudnovsky, E. M. Chudnovsky, E. M. Chudnovsky, E. M. Chudnovsky, Eugene M. Chudnovsky, L. D. Landau, Michael F. O’Keeffe   +7 more
core   +2 more sources

Glymphatic Dysfunction Reflects Post‐Concussion Symptoms: Changes Within 1 Month and After 3 Months

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Mild traumatic brain injury (mTBI) may alter glymphatic function; however, its progression and variability remain obscure. This study examined glymphatic function following mTBI within 1 month and after 3 months post‐injury to determine whether variations in glymphatic function are associated with post‐traumatic symptom severity ...
Eunkyung Kim, Han Gil Seo, Roh‐Eul Yoo, Byung‐Mo Oh   +3 more
wiley   +1 more source