Results 111 to 120 of about 746,739 (376)

Influence of Hysteresis on Magnetocaloric Performance at Cryogenic Temperatures: A Tb3Ni Case Study

Advanced Functional Materials, EarlyView.
The existence of an inverse magnetocaloric effect in metamagnetic materials at cryogenic temperatures is investigated using multiple methods. Contrary to predictions from magnetization data, neither specific heat nor pulsed‐field measurements show such a cooling effect, instead indicating irreversible heating.
Timo Niehoff, Benedikt Beckmann, Konstantin Skokov, Aritz Herrero, Alberto Oleaga, Eduard Bykov, Catalina Salazar Mejía, Marc Straßheim, Oliver Gutfleisch, J. Wosnitza, Tino Gottschall   +10 more
wiley   +1 more source

Hamiltonian of a spinning test-particle in curved spacetime

, 2009
Using a Legendre transformation, we compute the unconstrained Hamiltonian of a spinning test-particle in a curved spacetime at linear order in the particle spin.
A. Tulczyjew, A. Tulczyjew, Alessandra Buonanno, C. W. Misner, Enrico Barausse, Etienne Racine, F. Pirani, H. Goldstein, J. Steinhoff, K. Kyrian, L. Blanchet, M. Henneaux, M. Mathisson, M. E. Peskin   +13 more
core   +1 more source

Quantization of Hamiltonian and non-Hamiltonian systems

Communications in Analysis and Mechanics, 2023
<abstract> <p>The quantization process was always tightly connected to the Hamiltonian formulation of classical mechanics. For non-Hamiltonian systems, traditional quantization algorithms turn out to be unsuitable. Numerous attempts to quantize non-Hamiltonian systems have shown that this problem is nontrivial and requires the development ...
openaire   +2 more sources

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

Advanced Materials, EarlyView.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman, Ruben Goeminne, Kuber Singh Rawat, Veronique Van Speybroeck   +3 more
wiley   +1 more source

Finding the closed-form solutions of dissipative oscillatory systems

Scientific Reports, 2022
This paper shows how to use the approximate Hamiltonian approach for the non-conservative system not capable of possessing Hamiltonian. Using the approximate Hamiltonian method for a non-conservative system is not possible in general. We propose a way to
Saba Irum, Imran Naeem
doaj   +1 more source

Ostrogradsky's theorem on Hamiltonian instability

Scholarpedia, 2015
Ostrogradsky's construction of a Hamiltonian formalism for nondegenerate higher derivative Lagrangians is reviewed. The resulting instability imposes by far the most powerful restriction on fundamental, interacting, continuum Lagrangian field theories. A
R. Woodard
semanticscholar   +1 more source

On First Integrals of Hamiltonian System with Holonomic Hamiltonian

2022 IEEE 61st Conference on Decision and Control (CDC), 2022
In this study, the solution of the Hamilton-Jacobi equation (HJE) with holonomic Hamiltonian is investigated in terms of the first integrals of the corresponding Hamiltonian system. Holonomic functions are related to a specific type of partial differential equations called Pfaffian systems, whose solution space can be regarded as a finite-dimensional ...
openaire   +2 more sources

Single‐Layer Spin‐Orbit‐Torque Magnetization Switching Due to Spin Berry Curvature Generated by Minute Spontaneous Atomic Displacement in a Weyl Oxide

Advanced Materials, EarlyView.
Single‐layer magnetization switching with a small critical current density of ≈106 A cm−2 is demonstrated. The strong intrinsic spin Hall effect, causing the switching, is induced by the synergy of the inherent spin‐orbit coupling and the spontaneous oxygen octahedral rotation in SrRuO3.The findings highlight the immense potential for realizing ...
Hiroto Horiuchi, Yasufumi Araki, Yuki K. Wakabayashi, Jun'ichi Ieda, Michihiko Yamanouchi, Yukio Sato, Shingo Kaneta‐Takada, Yoshitaka Taniyasu, Hideki Yamamoto, Yoshiharu Krockenberger, Masaaki Tanaka, Shinobu Ohya   +11 more
wiley   +1 more source

Orbital Topology of Chiral Crystals for Orbitronics

Advanced Materials, EarlyView.
Chirality is ubiquitous in nature and constitutional for life. In chiral materials the intrinsic handedness, defined by their crystal structure, becomes a main driver for a novel electronic topology that is based on the orbital angular momentum rather than the electron spin.
Kenta Hagiwara, Ying‐Jiun Chen, Dongwook Go, Xin Liang Tan, Sergii Grytsiuk, Kui‐Hon Ou Yang, Guo‐Jiun Shu, Jing Chien, Yi‐Hsin Shen, Xiang‐Lin Huang, Iulia Cojocariu, Vitaliy Feyer, Minn‐Tsong Lin, Stefan Blügel, Claus Michael Schneider, Yuriy Mokrousov, Christian Tusche   +16 more
wiley   +1 more source

On interconnections of infinite-dimensional port-Hamiltonian systems [PDF]

, 2004
Network modeling of complex physical systems leads to a class of nonlinear systems called port-Hamiltonian systems, which are defined with respect to a Dirac structure (a geometric structure which formalizes the power-conserving interconnection structure
Pasumarthy, Ramkrishna, Schaft, Arjan J. van der   +1 more
core   +4 more sources