TITLE

Magnetochromatics of the magnetic fluid film under a dynamic magnetic field

AUTHOR(S)
Horng, Herng-Er; Yang, S. Y.; Lee, S. L.; Hong, Chin-Yih; Yang, H. C.
PUB. DATE
July 2001
SOURCE
Applied Physics Letters;7/16/2001, Vol. 79 Issue 3
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The structure and the corresponding magnetochromatics of homogeneous magnetic fluid films under dynamic magnetic fields perpendicular to the film surfaces are investigated in this letter. During the application of a magnetic field from 0 up to 200 Oe, the structure in the magnetic fluid film evolves from a monodispersed state to a disordered-column state, and then to an ordered hexagonal structure. The column spacing for the instant hexagonal structure during the dynamic process was measured and found to vary from 2.41 to 1.83 μm when the field strength was raised from 60 to 200 Oe. Within this range, the hexagonal structure diffracts the visible light like an optical grating. Due to the dynamic variation of the column spacing with the increasing field strength, the color of the diffracted light changed unceasingly from red to blue when observed from a fixed point above the film. The results strongly suggest the possibility that optical devices may be developed by utilizing the magnetochromatics of magnetic fluid films under dynamic magnetic fields. © 2001 American Institute of Physics.
ACCESSION #
4812775

 

Related Articles

  • Spectral Absorption of Unpolarized Light Through Nano-Materials in the Absence of a Magnetic Field. Luminosu, I.; Popov, D.; Zaharie, I. // Science of Sintering;Oct2008, Vol. 40 Issue 3, p223 

    A study of optical properties, such as light absorption, of a colloidal nano-material, provides information on the biphasic, solid — liquid system microstructure. The nano-material under study is a magnetic liquid (ferrofluid). The disperser agent is petroleum mineral oil and the...

  • The Investigation on the E-J Characteristics and the Role of Nanoparticle Concentration in Weakly Polar Magnetic Fluids. KURIMSKÝ, J.; DOLNÍK, B.; MARTON, K.; KOLCUN, M.; TOMČO, L.; RAJŇÁK, M.; TIMKO, M.; KOPČANSKÝ, P. // Acta Physica Polonica, A.;Jun2014, Vol. 125 Issue 6, p246 

    The paper presents investigation on the magnetic fluids that are stable colloidal suspensions of single-domain magnetic particles in a liquid carrier of dielectrics nature. Studies were made on the electric field vs. current density, e.i. E-J characterization commonly observed in insulating...

  • Environment-Friendly Magnetic Fluids for Wastewater Remediation - Synthesis and Characterization. NADEJDE, C.; NEAMTU, M.; CREANGA, D. // Acta Physica Polonica, A.;2015, Vol. 127 Issue 2, p647 

    Magnetic nanostructured materials have been found to be very efficient in wastewater decontamination. Among the various synthesis methods, co-precipitation is a rapid and cost-effective technique for the manufacturing of magnetic nanoparticles; moreover, using green chemistry for their...

  • Experimental characterization of thermal conductance switching in magnetorheological fluids. Gilhwan Cha; Sungtaek Ju, Y.; Ahuré, Louise A.; Wereley, Norman M. // Journal of Applied Physics;May2010, Vol. 107 Issue 9, p09B505-1 

    We experimentally investigate thermal conductance switching in Fe-based magnetorheological fluids (MRFs). The transient hot-square technique is employed to directly measure enhancement in the thermal conductivity of bulk samples with volume concentrations up to 33% along the field direction. The...

  • ON THE DYNAMICS OF SELF-RESTORING OF MAGNETIC FLUID MEMBRANES USING A CAVITATION MODEL. Polunin, V. M.; Shabanova, I. A.; Boev, M. L.; Ryapolov, P. A.; Postnikov, E. B. // Magnetohydrodynamics (0024-998X);Jul-Sep2011, Vol. 47 Issue 3, p303 

    It is suggested to use a cavitation model, which describes the processes of expanding and shutting of an empty spherical cavity (hole) in a non-viscous fluid, for interpretation of the dynamics of disruption and self-restoration of a magnetic fluid membrane. The conclusions of the model theory...

  • OPTICAL PROPERTIES OF MICROSTRUCTURED FIBRE TUNED BY FILLING WITH MAGNETIC LIQUIDS. VANDA, Jan; CANDIANI, Alessandro // Advances in Electrical & Electronic Engineering;Sep2013, Vol. 11 Issue 4, p295 

    One of the key advantages of microstructured optical fibers is the multitude of ways to modify their properties inaccessible by conventional fibers. Outstanding alternative for adjust optical fibers light-guiding properties by bulk glass doping is provided by infiltration of optically active...

  • Theoretical investigation of the extinction coefficient of magnetic fluid. Fang, Xiaopeng; Xuan, Yimin; Li, Qiang // Journal of Nanoparticle Research;May2013, Vol. 15 Issue 5, p1 

    A new theoretical approach for calculating the extinction coefficient of magnetic fluid is proposed, which is based on molecular dynamics (MD) simulation and T-matrix method. By means of this approach, the influence of particle diameter, particle volume fraction, and external magnetic filed on...

  • Squeeze strengthening of magnetorheological fluids using mixed mode operation. Becnel, A. C.; Sherman, S. G.; Hu, W.; Wereley, N. M. // Journal of Applied Physics;2015, Vol. 117 Issue 17, p17C708-1 

    This research details a novel method of increasing the shear yield stress of magnetorheological fluids by combining shear and squeeze modes of operation to manipulate particle chain structures, so-called squeeze strengthening. Using a custom built Searle cell magnetorheometer, which is a model...

  • Ferrofluid thin films as optical gaussmeters proposed for field and magnetic moment sensing. NAIR, SWAPNA; RAJESH, S; ABRAHAM, V; ANANTHARAMAN, M // Bulletin of Materials Science;Apr2011, Vol. 34 Issue 2, p245 

    Ferrofluids belonging to the series, NiFeFeO and ZnFeFeO, were synthesized using cold co-precipitation. Liquid films of these ferrofluids were prepared by encapsulating the ferrofluids in between two optically smooth and ultrasonically cleaned glass plates. Magnetic field induced laser...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics