Tailoring Local Hysteresis in Small Clusters of Dipolar Interacting Magnetic Nanoparticles

NANO ◽  
2021 ◽  
pp. 2150104
Author(s):  
Manish Anand
Keyword(s):  
Particle Size ◽  
Magnetic Nanoparticles ◽  
Hysteresis Loop ◽  
Cluster Size ◽  
Interaction Strength ◽  
Dipolar Interaction ◽  
Dipolar Field ◽  
Area Formula ◽  
Loop Area ◽  
Hysteresis Loop Area

Using first-principle calculations and kinetic Monte Carlo simulation, we study the local and averaged hysteresis in tiny clusters of [Formula: see text] magnetic nanoparticles (MNPs) or [Formula: see text]-mers. We also analyze the variation of local dipolar field acting on the constituent nanoparticles as a function of the external magnetic field. The dipolar interaction is found to promote chain-like arrangement in such a cluster. Irrespective of cluster size, the local hysteresis response depends strongly on the corresponding dipolar field acting on a nanoparticle. In a small [Formula: see text]-mer, there is a wide variation in local hysteresis as a function of nanoparticle position. On the other hand, the local hysteresis is more uniform for larger [Formula: see text]-mer, except for MNPs at the boundary. In the case of superparamagnetic nanoparticle and weak dipolar interaction, the local hysteresis loop area [Formula: see text] is minimal and depends weakly on the [Formula: see text]-mer size. While for ferromagnetic counterpart, [Formula: see text] is considerably large even for weakly interacting MNPs. The value of [Formula: see text] is found to be directly proportional to the dipolar field acting on the nanoparticle. The dipolar interaction and [Formula: see text]-mer size also enhance the coercivity and remanence. There is always an increase in [Formula: see text] with cluster size and dipolar interaction strength. Similarly, the averaged hysteresis loop area [Formula: see text] also depends strongly on the [Formula: see text]-mer size, particle size and dipolar interaction strength. [Formula: see text] and [Formula: see text] always increase with [Formula: see text]-mer size and dipolar interaction strength. Interestingly, the value of [Formula: see text] saturates for [Formula: see text] and considerable dipolar interaction irrespective of particle size. We believe that this work would help understand the intricate role of dipolar interaction on hysteresis and the organizational structure of MNPs and their usage in drug delivery and hyperthermia applications.

HYSTERESIS STUDIES IN COUPLED MAP LATTICES

1999 ◽  
Vol 13 (22n23) ◽  
pp. 809-817 ◽  
Author(s):  
RENUKA RAI ◽  
HARJINDER SINGH
Keyword(s):  
Hysteresis Loop ◽  
Coupling Strength ◽  
Signal To Noise Ratio ◽  
Coupled Map Lattices ◽  
Hysteresis Phenomenon ◽  
Signal To Noise ◽  
Loop Area ◽  
Spatially Extended ◽  
Hysteresis Loop Area ◽  
Spatially Extended Systems

We have studied hysteresis phenomenon in spatially extended systems and investigated the effect of additive and parametric noises. We observe that the behavior of hysteresis loop area as a function of coupling strength is different for additive and parametric noises. It is interesting to observe that behavior of hysteresis loop area is analogous to the behavior of the signal-to-noise ratio [Phys. Rev.E56, 2518 (1997)].

scholarly journals Hysteresis loop area of the Ising model

2004 ◽  
Vol 70 (13) ◽  
Author(s):  
Han Zhu ◽  
Shuai Dong ◽  
J.-M. Liu
Keyword(s):  
Ising Model ◽  
Hysteresis Loop ◽  
Loop Area ◽  
Hysteresis Loop Area

scholarly journals Dynamic Stall Control Over a Rotor Airfoil Based on AC DBD Plasma Actuation

2020 ◽  
Author(s):  
Guangyin Zhao ◽  
Yong Huang ◽  
Yongdong Yang ◽  
Guoqiang Li ◽  
Hesen Yang
Keyword(s):  
Hysteresis Loop ◽  
Dynamic Stall ◽  
Control Effect ◽  
Dbd Plasma ◽  
Plasma Actuation ◽  
Loop Area ◽  
History Of ◽  
Hysteresis Loop Area ◽  
Control Capability ◽  
Stall Control

Abstract At present, the control capability of dielectric barrier discharge (DBD) plasma actuation covers the flow velocity range of helicopter’s retreating blades, so it is necessary to extend it to the dynamic stall control of rotor airfoils. A DBD plasma actuator was adopted to control the dynamic stall of an oscillating CRA309 airfoil in this paper. The effectiveness of alternating current (AC) DBD plasma actuation on reducing the area of lift hysteresis loop of the oscillating airfoil was verified through pressure measurements at a Reynolds number of 5.2×105. The influence of actuation parameters on the airfoil’s lift and moment coefficients was studied. Both steady and unsteady actuation could effectively reduce the hysteresis loop area of the lift coefficients. The flow control effect of dynamic stall was strongly dependent on the history of angle of attack. Compared with the steady actuation, unsteady actuation had more obvious advantages in dynamic stall control, with reducing the area of lift hysteresis loop by more than 30%. The effects of plasma actuation on the airfoil’s flow field at both upward and downward stages were discussed at last.

scholarly journals Investigation of the Mechanism of Moisture Absorption in Colloidal Museum Materials in Order to Improve the Safety of Exhibits and Improve the Hygiene of Museum Rooms

2019 ◽  
Vol 1 (1) ◽  
pp. 805-809
Author(s):  
Volodymyr Dovhaliuk ◽  
Adam Ujma ◽  
Yurii Chovniuk
Keyword(s):  
Hysteresis Loop ◽  
Moisture Absorption ◽  
Moisture Sorption ◽  
Museum Exhibits ◽  
Porous Bodies ◽  
Loop Area ◽  
Hysteresis Loop Area ◽  
Almost All ◽  
Kinetics Of ◽  
Kinetics Of Sorption

AbstractMoisture sorption is one of the most important destruction factors for colloidal capillary-porous exhibits in museums (painting, clothing etc.), which is dependent on microclimate in museum rooms. The analysis of moisture sorption properties, kinetics of sorption and swelling of textile museum exhibits is carried out. Isotherms of desorption of viscose and woollen yarns and fabrics of different density (and threads of them) are identical. The analysis of the isotherms of fabrics of various fibre cloths and threads of them shows that they all are similar in shape to the curves and have the form typical for leading capillary-porous bodies. The hysteresis loop for almost all tissues is observed throughout the range of relative humidity of the medium. In this work, the characteristics of the hysteresis loop (area, limited by it, length of the loop), which are of informational significance in the description of the processes of isothermal sorption-desorption of the materials mentioned above, are indicated. The research results allow optimizing of microclimate control in museum rooms for elimination of destruction of exhibits, improve the safety of storage and ensure the hygiene of the air indoor environmental.

scholarly journals Improving the texture and rheology of set and stirred kombucha fermented milk beverages by addition of transglutaminase

Mljekarstvo ◽  
2021 ◽  
Vol 71 (3) ◽  
pp. 155-164
Author(s):  
Mirela Iličić ◽  
Keyword(s):  
Hysteresis Loop ◽  
Rheological Properties ◽  
Control Sample ◽  
Great Influence ◽  
Fermented Milk ◽  
Milk Products ◽  
Loop Area ◽  
Hysteresis Loop Area ◽  
Sample Set ◽  
Fermented Milk Products

The possibilities of manufacturing fermented milk beverages by applying kombucha inoculum concentrated by evaporation and with addition of transglutaminase have been investigated. The main aims of this study were to investigate influence of concentrated kombucha inoculum and the addition of transglutaminase (TG) on textural, rheological and sensory properties of set and stirred fermented milk beverages. The results showed that the addition of transglutaminase had a great influence on textural characteristics and rheological properties of kombucha fermented milk beverages. Firmness and consistency of kombucha fermented milk products were significantly increased with the incorporation of TG compared to the control sample. Set samples with TG addition had approximately 90 % higher hysteresis loop area compared to stirred samples, while hysteresis loop area of stirred samples without TG was 60 % lower compared to set samples. The enzymatic treatment of milk with TG improved texture, rheology and sensorial characteristics of set and stirred fermented milk beverages obtained by concentrated kombucha inoculum.

scholarly journals Research on Flocculation of Cement Particles in Water

2021 ◽  
Vol 237 ◽  
pp. 03014
Author(s):  
Yanfeng Zuo ◽  
Yijie Zhang ◽  
Dongmin Wang
Keyword(s):  
Electrical Property ◽  
Electric Field ◽  
Hysteresis Loop ◽  
Cement Paste ◽  
Rotational Viscometer ◽  
Loop Area ◽  
Hysteresis Loop Area ◽  
Electric Quantity

Nowadays, workability is absolutely necessary for piping concrete, which is influenced by characteristics of structure of fresh cement paste. In this paper, the movement of particles in electric field and flocculent units at different W/C were observed, and rheologic characteristics of fresh cement paste at different W/C and the pastes with naphthalene sulphonate (NS) and poly carboxylate (PC) superplasticizers were investigated using rotational viscometer (NXS-11A). It is found that at initial hydration age cement particles carry different electric quantity and electrical property; increment of W/C induces flocculent units more separated, less hysteresis loop area and lower crush point; application of superplasticizers brings much less loop area and indistinct crush point. It is concluded that 1) fresh cement paste is filled with flocculation units of different strength; 2) different units are connected with one another loosely; 3) tunnels for bleeding form in the weakest connecting area. Water can disperse flocculent units to some extent, especially for superplasticizers. However, the latter can’t separate flocculation of cement particles completely.

scholarly journals Study on Thixotropic Properties of Waxy Crude Oil Based on Hysteresis Loop Area

Engineering ◽  
2015 ◽  
Vol 07 (07) ◽  
pp. 469-476
Author(s):  
Liping Guo ◽  
Yu Wang ◽  
Shuang Shi ◽  
Xiaoyang Yu ◽  
Xu Chen
Keyword(s):  
Crude Oil ◽  
Hysteresis Loop ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Loop Area ◽  
Hysteresis Loop Area
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