Results 131 to 140 of about 321,049 (388)

The second order dense ferromagnetic-ferromagnetic phase transition [PDF]

arXiv, 2010
The fcc spin-1 Ising (BEG) model has a dense ferromagnetic ($df$) ground state instead of the ferromagnetic ground state at low temperature region and exhibits the dense ferromagnetic ($df$) - ferromagnetic ($F$) phase transition for $d=D/J=2.9$, $k=K/J=-0.5$, $\ell =L/J=0$ and $h=H/J=0$.
arxiv  

Stabilization of d-Band Ferromagnetism by Hybridization with Uncorrelated Bands

, 2001
We investigate the influence of s-d or p-d hybridization to d-band ferromagnetism to estimate the importance of hybridization for the magnetic properties of transition metals.
A. C. Hewson, A. Georges, A. I. Lichtenstein, A. N. Tahvildar-Zadeh, B. Möller, B. Velicky, D. Meyer, D. Vollhardt, D. Vollhardt, J. Bünemann, J. Hubbard, J. Kanamori, J. Wahle, M. Bünger, M. C. Gutzwiller, M. Caffarel, M. Jarrell, M. Jarrell, M. Potthoff, M. Ulmke, R. Arita, S. Schwieger, T. Hermann, T. Herrmann, T. Maier, T. Yanagisawa, V. Sechovsky, W. Metzner, W. Nolting, W. Nolting, Y. Ono   +30 more
core   +1 more source

Hole-mediated ferromagnetism in tetrahedrally coordinated semiconductors [PDF]

, 2000
A mean-field model of ferromagnetism mediated by delocalized or weakly localized holes in zinc-blende and wurzite diluted magnetic semiconductors is presented.
T. Dietl, T. Dietl, Hideo Ohno, F. Matsukura   +3 more
semanticscholar   +1 more source

Tuning Transition Metal 3d Spin state on Single‐atom Catalysts for Selective Electrochemical CO2 Reduction

Advanced Materials, EarlyView.
The introduction of P into a single‐atom Fe catalyst is shown to induce a shift in its electronic configuration toward a high spin state. This is proposed to enhance electron back donation via the dxz/dyz‐π* bond, which improves *COOH adsorption and facilitates the electrochemical conversion of CO2 to CO.
Yipeng Zang, Yan Liu, Ruihu Lu, Qin Yang, Bingqing Wang, Mingsheng Zhang, Yu Mao, Ziyun Wang, Yanwei Lum   +8 more
wiley   +1 more source

Ferromagnetic behaviour of ZnO: the role of grain boundaries

Beilstein Journal of Nanotechnology, 2016
The possibility to attain ferromagnetic properties in transparent semiconductor oxides such as ZnO is very promising for future spintronic applications. We demonstrate in this review that ferromagnetism is not an intrinsic property of the ZnO crystalline
Boris B. Straumal, Svetlana G. Protasova, Andrei A. Mazilkin, Eberhard Goering, Gisela Schütz, Petr B. Straumal, Brigitte Baretzky   +6 more
doaj   +1 more source

Ferromagnetic half-metallicity in half-Heusler AuMnSn:Te Alloy

Materials Research Express, 2020
Identifying a strategy for beneficial band-engineering is vital for the optimization of spintronic materials. In this study, we demonstrate the beneficial effects of electron doping on ferromagnetic (FM) half-Heusler AuMnSn _1− _x Te _x (0 ≤  x  ≤ 1 ...
T C Chibueze, C E Ekuma, A T Raji, D P Rai, C M I Okoye   +4 more
doaj   +1 more source

Proximity‐Mediated Multi‐Ferroelectric Coupling in Highly Strained EuO‐Graphene Heterostructures

Advanced Materials, EarlyView.
Magneto‐ferroelectric effects in van der Waals EuO/graphene heterostructures emerge via a topotactic method, inducing high compressive strain. This strain stabilizes a ferroelectric state up to room temperature, coexisting with the magnetic proximity effect in graphene.
Satakshi Pandey, Thomas Pin, Simon Hettler, Raul Arenal, Corinne Bouillet, Thomas Maroutian, Jérôme Robert, Benoit Gobaut, Bohdan Kundys, Jean‐François Dayen, David Halley   +10 more
wiley   +1 more source

Ferromagnetic behavior of native point defects and vacancy-clusters in ZnO studied by first principle calculation

Materials Research Express, 2020
The origin of room temperature ferromagnetism in undoped ZnO is still a question of debate. Experimental and theoretical findings are inconclusive as to the predominant contributor for the magnetic behavior of undoped ZnO.
Cai-Qin Luo, Si-Cong Zhu, Chi-Hang Lam, Francis Chi-Chung Ling   +3 more
doaj   +1 more source

Absence of ferromagnetism in Mn- and Co-doped ZnO

, 2004
Following the theoretical predictions of ferromagnetism in Mn- and Co-doped ZnO, several workers reported ferromagnetism in thin films as well as in bulk samples of these materials.
Deepak, F. L., Rao, C. N. R.
core   +1 more source

Quantum Geometric Moment Encodes Stacking Order of Moiré Matter

Advanced Materials, EarlyView.
The Berry curvature dipole (BCD) changes across valley Chern transitions. A new electrical technique is developed to use such BCD sign flips for distinguishing the stacking order of a moiré material, namely twisted double bilayer graphene. Such a method, analogous to spectroscopic techniques, establishes a link between quantum geometry and stacking ...
Surat Layek, Subhajit Sinha, Atasi Chakraborty, Ayshi Mukherjee, Heena Agarwal, Kenji Watanabe, Takashi Taniguchi, Amit Agarwal, Mandar M. Deshmukh   +8 more
wiley   +1 more source