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The mechanism of magnetization reversal in single-domain ferromagnetic particles is of interest in many applications, in most of which losses must be minimized. In cancer therapy by hyperthermia the opposite requirement prevails: the…

Other Condensed Matter · Physics 2009-11-13 P. F. de Chatel , I. Nandori , J. Hakl , S. Meszaros , K. Vad

In this letter, we study the radiative heat transfer between two nanoparticles in the near field and in the far field. We find that the heat transfer is dominated by the electric dipole-dipole interaction for dielectric particles and by the…

Colloidal suspensions of ferromagnetic nano-particles, so-called ferrofluids, are shown to be suitable systems to demonstrate and investigate thermal ratchet behavior: By rectifying thermal fluctuations, angular momentum is transferred to a…

Materials Science · Physics 2009-11-07 Andreas Engel , Hanns Walter Mueller , Peter Reimann , Achim Jung

We study theoretically the effect of a rotating electric field on a diffusive nanowire and find an effect that is analogous to spin pumping, which refers to the generation of spin through a rotating magnetic field. The electron spin couples…

Mesoscale and Nanoscale Physics · Physics 2023-07-13 Eirik Holm Fyhn , Jacob Linder

We have studied the relaxation and transport properties of a ferrofluid in an elongational flow. These properties are influenced by the bistable nature of the potential energy. Bistability comes from the irrotational character of the flow…

Condensed Matter · Physics 2009-10-30 T. Alarcon , A. Perez-Madrid , J. M. Rubi

Magnetic hyperthermia is an adjuvant therapy for cancer where injected magnetic nanoparticles are used to transfer energy from the time-dependent applied magnetic field into the surrounding medium. Its main importance is to be able to…

Soft Condensed Matter · Physics 2022-03-09 Zs. Iszaly , I. Gresits , I. G. Marian , Gy. Thuroczy , O. Sagi , B. G. Markus , F. Simon , I. Nandori

We investigate a simple model corresponding to particles driven in opposite directions and interacting via a repulsive potential. The particles move off-lattice on a periodic strip and are subject to random forces as well. We show that this…

Statistical Mechanics · Physics 2009-10-31 Dirk Helbing , Illes Farkas , Tamas Vicsek

The observed magnetic tunability of light transmission through a ferrofluid can be effectively understood in terms of the inter-particle interaction that can be estimated from the magnetic and rheological properties of these fluids. The…

Soft Condensed Matter · Physics 2016-02-22 M Shalini , Radha Srinivasan , Dushyant C Kothari

Detailed studies of the intriguing field-dependent dynamics and transport properties of confined flowing ferrofluids require efficient mesoscopic simulation methods that account for fluctuating ferrohydrodynamics. Here, we propose such a…

Soft Condensed Matter · Physics 2024-06-19 Patrick Ilg

We study the rotational motion of nano-flake ferromagnetic discs suspended in a Newtonian fluid, as a potential material owing the vortex-like magnetic configuration. Using analytical expressions for hydrodynamic, magnetic and Brownian…

This manuscript is devoted to study the combined effect of a viable model, f(R) = R + \alpha R^n, and electromagnetic field on the instability range of gravitational collapse. We assume charged anisotropic fluid that dissipate energy via…

General Relativity and Quantum Cosmology · Physics 2014-02-03 H. Rizwana Kausar , Ifra Noureen

In this paper, the generation of magnetic fields in a nonuniformly rotating layer of finite thickness of an electrically conducting fluid by thermomagnetic (TM) instability. This instability arises due to the temperature gradient $\nabla…

Fluid Dynamics · Physics 2021-04-23 M. I. Kopp , K. N. Kulik , A. V. Tur , V. V. Yanovsky

We study the radiative heat flux between two nanoparticles in close vicinity to the natural hyperbolic material hBN with its optical axis oriented parallel to the interface. We show that the heat flux between the nanoparticles can be…

Mesoscale and Nanoscale Physics · Physics 2022-10-25 Annika Ott , Yang Hu , Xiao-Hu Wu , Svend-Age Biehs

Uncertainties plays an important character in almost every problem which generally not considered and ideal cases are studied. As such, the consequences cost more and need model prediction. In view of these, this paper investigates…

Systems and Control · Electrical Eng. & Systems 2022-07-28 Sangeetha P S , Sukanta Nayak

Since it is difficult to apply the existing method of friction and heat flux decomposition on the complex surface, a combined decomposition method of friction and heat flux with clear physical interpretation is proposed, which is based on…

Fluid Dynamics · Physics 2023-03-16 Mingzhi Tang , Wenfeng Zhou , Yanchao Hu , Gang Wang , Ming Fang , Yan-guang Yang

The thermodynamics of an electrically charged, multicomponent fluid with spontaneous electric dipoles and magnetic moments is analysed in the presence of electromagnetic fields. Taking into account the chemical composition of the current…

Statistical Mechanics · Physics 2015-06-15 Sylvain D. Brechet , Jean-Philippe Ansermet

Magnetic nanoparticles (MNP's) have become increasingly important in heating applications such as hyperthermia treatment of cancer due to their ability to release heat when a remote external alternating magnetic field is applied. It has…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 Gowrishankar Seshadri , Rochish Thaokar , Anurag Mehra

We study the nonlinear dynamics of single-domain ferromagnetic nanoparticles in a viscous liquid induced by a harmonically oscillating gradient magnetic field in the absence and presence of a static uniform magnetic field. Under some…

Soft Condensed Matter · Physics 2021-11-23 S. I. Denisov , T. V. Lyutyy , A. T. Liutyi

Based on a microscopic approach, we propose a Lagrangian for the combined system of a rotating dielectric nanoparticle above a plane surface in the presence of electromagnetic vacuum fluctuations. In the framework of canonical quantization,…

Quantum Physics · Physics 2015-08-19 Vahid Ameri , Mehdi Shafei Aporvari , Fardin Kheirandish

Quantizing the electromagnetic vacuum and medium fields of two nanoparticles, we investigate the heat transfer between them. One of the particles has been considered to rotate by angular velocity $ \omega_0 $. The effect of rotation on the…

Mesoscale and Nanoscale Physics · Physics 2018-01-17 Vahid Ameri , Mohammad Eghbali-Arani