Browsing Faculty of Science by Title

Browsing Faculty of Science by Title

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  • Anisotropic compact sphere with Van der Waals equation of state 
    Thirukkanesh, S.; Ragel, F. C. (Astrophysics and Space Science, 2014)
    We formulate a system of field equations with Van der Waals type equation of state to the Einstein field equations in spherically symmetric static spacetime to describe anisotropic compact matter and obtain a new class of ...
  • Anisotropic extension of Finch and Skea stellar model Astrophysics and Space Science 
    Sharma Ranjan; Das Shyam; Thirukkanesh, S. (Astrophysics and Space Science, 2017)
    In this paper, the spacetime geometry of Finch and Skea [Class. Quantum Grav., 6 (1989) 467] has been utilized to obtain closed-form solutions for a spherically symmetric anisotropic matter distribution. By examining its ...
  • Anisotropic generalization of well-known solutions describing relativistic self-gravitating fluid systems: an algorithm 
    Thirukkanesh, S.; Ragel, F. C.; Sharma Ranjan; Das Shyam (The European Physical Journal, 2018)
    We present an algorithm to generalize a plethora of well-known solutions to Einstein field equations describing spherically symmetric relativistic fluid spheres by relaxing the pressure isotropy condition on the system. ...
  • Anisotropic spheres with Van der Waals-type equation of state 
    Thirukkanesh, S.; Ragel, F. C. (INDIAN ACAD SCIENCES and SPRINGER, 2014)
    We study static spherically symmetric space-time to describe relativistic compact objects with anisotropic matter distribution and derive two classes of exact models to the Einstein–Maxwell system with a modified Van der ...
  • Anisotropic static spheres with linear equation of state in isotropic coordinates 
    Govender, M; Thirukkanesh, S. (Astrophysics and Space Science, 2015)
    In this paper we present a general framework for generating exact solutions to the Einstein field equations for static, anisotropic fluid spheres in comoving, isotropic coordinates obeying a linear equation of state of the ...
  • Causal heat flow in Bianchi type-V Universe 
    Govender, M; Thirukkanesh, S. (International Journal of Modern Physics, 2014)
    In this paper we investigate the role of causal heat transport in a spatially homogeneous, locally-rotationally symmetric Bianchi type-V cosmological model. In particular, the causal temperature profile of the cosmological ...
  • Characterization of epitaxial Cr thin films 
    Prinsloo, A. R. E.; Sheppard, C. J.; Fernando, P. R.; Madau, P. (59th Annual Conference of the South African Institute of Physics, 2013)
    Thin films and heterostructures of Cr and Cr alloys show fascinating properties that is not observed in the bulk material and research into their magnetic properties gives insight into dimensionality effects in these ...
  • Charged analogue of well behaved neutral spheres: an algorithmic approach 
    Thirukkanesh, S.; Ragel, F. C. (CHINESE PHYSICAL SOC, PEOPLES R CHINA and IOP Publishing Ltd, 2016)
    We establish a systematic algorithmic approach that generates new classes of solutions to the Einstein-Maxwell system in static spherically symmetric spacetime from well known uncharged solutions. A particular case is shown ...
  • Charged anisotropic matter with a linear equation of state, Classical and Quantum Gravity 
    Thirukkanesh, S; Maharaj, S. D. (Classical and Quantum Gravity, 2008)
    We consider the general situation of a compact relativistic body with anisotropic pressures in the presence of the electromagnetic field. The equation of state for the matter distribution is linear and may be applied to ...
  • Charged relativistic spheres with generalized potentials 
    Thirukkanesh, S.; Maharaj, S. D. (Mathematical Methods in the Applied Sciences, 2009)
    A new class of exact solutions of the Einstein-Maxwell system is found in closed form. This is achieved by choosing a generalised form for one of the gravitational potentials and a particular form for the electric field ...
  • Chemical pressure and magnetic field effects in CePtGa 
    Ragel, F. C.; P de V du Plessis; A M Strydom (IOP PUBLISHING LTD, 2007)
    The antiferromagnetic Kondo compound CePtGa and the Ce(Pt1−xNix)Ga and CePt(Ga1−yAly) alloy systems have been studied by resistivity ρ(T), magnetoresistivity MR and susceptibility χ(T) measurements on polycrystalline samples ...
  • A class of exact strange quark star model 
    Thirukkanesh, S.; Ragel, F. C. (Pramana-Journal of Physics, 2013)
    Static spherically symmetric space-time is studied to describe dense compact star with quark matter within the framework of MIT Bag Model. The system of Einstein’s field equations for anisotropic matter is expressed as ...
  • Competing 4f-electron dynamics in Ce(Ru1-xFex) 2Al10 (0≤x≤1.0): Magnetic ordering emerging from the Kondo semiconducting state 
    Adroja, D. T.; Hillier, A. D.; Muro, Y.; Kajino, J.; Takabatake, T.; Peratheepan, P.; Strydom, A. M.; Deen, P. P.; Demmel, F.; Stewart, J. R.; Taylor, J. W.; Smith, R. I.; Ramos, S.; Adams, M.A. (Physical Review, 2013)
    We have carried out muon spin relaxation (muSR), neutron diffraction and inelastic neutron scattering (INS) investigations on polycrystalline samples of Ce(Ru1-xFex)2Al10 (x=0, 0.3, 0.5, 0.8 and 1) to investigate the nature ...
  • Competing effects by Y dilution in CeNiAl4 
    Ragel, F. C.; P de V du Plessis; A M Strydom (Solid State Communications, 2007)
    The occurrence of a maximum at a temperature T-max in the resistivity of the dense Kondo compound CeNiAl4 and in (Ce1-x,Y-x)NiAl4 alloys is investigated. Tmax (proportional to T-K, the Kondo temperature) first increases, ...
  • Contiguous 3d and 4f Magnetism: strongly correlated 3d electrons in YbFe2Al10 
    Khuntia, P.; Peratheepan, P.; Strydom, A. M.; Utsumi, Y.; Tsuei, K. D.; Tjeng, L. H.; Steglich, F.; Baenitz, M. (Physical Review, 2014)
    We present magnetization, specific heat, and 27 Al NMR investigations on YbFe 2 Al 10 over a wide range in temperature and magnetic field. The magnetic susceptibility at low temperatures is strongly enhanced ...
  • Contrasting effect of La substitution on the magnetic moment direction in the Kondo semiconductors Ce T 2 Al 10 ( T = Ru , Os ) 
    Adroja, D. T.; Hillier, A. D.; Ritter, C; Bhattacharyya, A.; Khalyavin, D. D.; Strydom, A. M.; Peratheepan, P.; Fak, B.; Koza, M. M.; Kawabata, J.; Yamada, Y.; Okada, Y.; Muro, Y.; Takabatake, T.; Taylor, J. W. (PHYSICAL REVIEW, 2015)
    The opening of a spin gap in the orthorhombic compounds Ce T 2 Al 10 ( T = Ru and Os ) is followed by antiferromagnetic ordering at T N = 27 and 28.5 K, respectively, with a small ordered moment ...
  • Designing a Cooker to Utilise the Natural Waste Rice Husk as a Cooking Gas, 
    Fernando, P. R.; Karthika, U.; Parthipan, K.; Shandarabavan, T.; Ismail, R.; Jeeva, A (Advances in Recycling & Waste Management, 2017)
    Environmental pollution is big issue in the world, which is from the natural by-products. Some of these byproducts can be transformed into alternative energy source. Rice husk is the one of the natural by-product which ...
  • Dilution and Non-Fermi-liquid effects in the CePtIn Kondo lattice 
    Ragel, F. C.; P de V du Plessis; A M Strydom (Journal of Physics, 2009)
    Measurements of electrical resistivity (ρ(T)), magnetoresistivity (MR), magnetic susceptibility (χ(T)) and heat capacity (CP(T)) are presented for the (Ce1−xLax)PtIn alloy system of which the CePtIn parent is a known dense ...
  • Dissipative collapse in the presence of Λ 
    Govender, M; Thirukkanesh, S. (International Journal of Theoretical Physics, 2009)
    We present the general junction conditions for the smooth matching of a spherically symmetric, shear-free spacetime to Vaidya’s outgoing metric across a four-dimensional time-like hypersurface in the presence of a cosmological ...
  • Effects of Fe substitution for isoelectronic Ru on the magnetic and transport properties of CeRu2Al10 
    Peratheepan, P.; Strydom, A. M. (The European Conference, 2014)
    We have investigated the effects of magnetic Fe ion substitution in Ce(Ru1−xFex)2Al10 on the magnetic and transport properties, when the Kondo insulator CeRu2Al10 with anomalous antiferromagnetic order at TN = 27 K [1] ...

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