Mohamad Nazri Abdul Halif, Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/65720
Sat, 04 Feb 2023 22:17:03 GMT2023-02-04T22:17:03ZMohamad Nazri Abdul Halif, Dr.http://dspace.unimap.edu.my:80/bitstream/id/156380/
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/65720
Journal Impact Factor
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/9962
Journal Impact Factor
Mohamad Nazri, Abdul Halif
Mon, 01 Jan 2007 00:00:00 GMThttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/99622007-01-01T00:00:00ZA numerical approach of Polarization profile for First-Order Ferroelectric film system using Finite-Difference method
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/7128
A numerical approach of Polarization profile for First-Order Ferroelectric film system using Finite-Difference method
Mohamad Nazri, Abdul Halif; Junaidah, Osman
A detail account of numerical calculations using Finite-Difference Method (FDM) to calculate the polarization profile in first-order ferroelectric (FE) film system is given. For film, both symmetric and
asymmetric cases are considered. The formalism is based on Tilley and Žekš (TZ) model using Landau-Devonshire (LD) equations with the boundary conditions. The numerical technique is described using Central and
Forward Finite-Difference Approximation.
Organized by Kolej Universiti Kejuruteraan Utara Malaysia (KUKUM), 18th - 19th May 2005 at Putra Palace Hotel, Kangar.
Wed, 18 May 2005 00:00:00 GMThttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/71282005-05-18T00:00:00ZSurface state on first-order ferroelectrics
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/6614
Surface state on first-order ferroelectrics
Junaidah, Osman; Tilley, David Reginald; Rosy, Teh; Ishibashi, Y.; Mohamad Nazri, Abdul Halif; Khian, Hooi Chew
In the presence of a surface the Landau-Devonshire equations of ferroelectricity must be extended to include a boundary condition. For a ferroelectric with a second-order transition in the case when the polarization p(z) increases at the surface, it is well known that a surface state occurs in a range of temperature above the bulk critical temperature tCB . Here we explore the corresponding effect for a first-order ferroelectric. We show that a surface state can occur, but only if the surface effect is sufficiently strong. Analytic expressions are derived and illustrated for p(z), the surface value pS =p(0) and the free energy. The transition from the paraelectric state (p=0) to the surface state is first order, and for completeness we establish the dependence of the three critical temperatures (supercooling, thermodynamic and superheating) on a boundary-condition parameter y. In a final section, we derive and illustrate expressions for p(z)in the temperature range t<tCB.
Link to publisher's homepage at http://www.springerlink.com
Sun, 01 Jan 2006 00:00:00 GMThttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/66142006-01-01T00:00:00ZTheoretical investigation of far-infrared optical behaviors in asymmentrical first-order ferroelectrtric thick film
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/6374
Theoretical investigation of far-infrared optical behaviors in asymmentrical first-order ferroelectrtric thick film
Mohamad Nazri, Abdul Halif; Khian Hooi, Chew; David R., Tilley; Junaidah, Osman
This paper gives a detailed, fully numerical approach to investigate the behavior of far-infrared (FIR) waves in the first-order of asymmetrical thick film ferroelectrics on semiconductor substrate. The theoretical calculation represents two optical conditions: asymmetric non-surface case and asymmetric-surface case, where the extrapolation lengths are g~' = 0 and S'1 * 0 respectively. Basically, the calculations are discussed on the basis of Tilley-Zeks (TZ) model with propagation of FIR waves described by Landau-Khalatnikov (LK) equation of motion and Maxwell's electromagnetic wave equation. The asymmetric-non-surface conditions are characterized by the influence of refractive index of the substrate while for asymmetric-surface term; the behaviors are based on positive-negative Sf' # S_~' surface terms and also refractive index.
Organized by Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 6th - 8th December 2005 at IOI Marriott, Putrajaya.
Tue, 06 Dec 2005 00:00:00 GMThttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/63742005-12-06T00:00:00Z