Abu Thahir | Indira Gandhi Centre for Atomic Research (original) (raw)
Address: Chennai, Tamil Nadu, India
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Papers by Abu Thahir
Journal of Magnetism and Magnetic Materials, 2017
The paper presents magnetic force microscopy (MFM) studies on the effect of crystallographic orie... more The paper presents magnetic force microscopy (MFM) studies on the effect of crystallographic orientation and external magnetic field on magnetic microstructure in a bulk polycrystalline iron specimen. The mag-neto crystalline anisotropic effect on the domain structure is characterized with the support of electron backscatter diffraction study. The distinct variations in magnetic domain structure are observed based on the crystallographic orientation of the grain surface normal with respect to the cube axis i.e. the easy axis of magnetization. Further, the local magnetization behavior is studied in-situ by MFM in presence of external magnetic field in the range of À2000 to 2000 Oe. Various micro-magnetization phenomena such as reversible and irreversible domain wall movements, expansion and contraction of domains, Barkhausen jump, bowing of a pinned domain wall and nucleation of a spike domain are visualized. The respective changes in the magnetic microstructure are compared with the bulk magnetization obtained using vibrating sample magnetometer. Bowing of a domain wall, pinned at two points, upon application of magnetic field is used to estimate the domain wall energy density. The MFM studies in presence of external field applied in two perpendicular directions are used to reveal the influence of the crystalline anisotropy on the local micro-magnetization.
Managerial Auditing Journal, 2006
... Abu Thahir Abdul Nasser, Faculty of Accountancy, University Technology Mara, Johor, Malaysia.... more ... Abu Thahir Abdul Nasser, Faculty of Accountancy, University Technology Mara, Johor, Malaysia. ... Dopuch, N. (1984), "The demand for quality-differentiated audit services in an agency-cost setting: an empirical investigation: discussion", in Abdel-Khalik, A., Solomon, I. (Eds ...
Journal of Magnetism and Magnetic Materials, 2017
The paper presents magnetic force microscopy (MFM) studies on the effect of crystallographic orie... more The paper presents magnetic force microscopy (MFM) studies on the effect of crystallographic orientation and external magnetic field on magnetic microstructure in a bulk polycrystalline iron specimen. The mag-neto crystalline anisotropic effect on the domain structure is characterized with the support of electron backscatter diffraction study. The distinct variations in magnetic domain structure are observed based on the crystallographic orientation of the grain surface normal with respect to the cube axis i.e. the easy axis of magnetization. Further, the local magnetization behavior is studied in-situ by MFM in presence of external magnetic field in the range of À2000 to 2000 Oe. Various micro-magnetization phenomena such as reversible and irreversible domain wall movements, expansion and contraction of domains, Barkhausen jump, bowing of a pinned domain wall and nucleation of a spike domain are visualized. The respective changes in the magnetic microstructure are compared with the bulk magnetization obtained using vibrating sample magnetometer. Bowing of a domain wall, pinned at two points, upon application of magnetic field is used to estimate the domain wall energy density. The MFM studies in presence of external field applied in two perpendicular directions are used to reveal the influence of the crystalline anisotropy on the local micro-magnetization.
Managerial Auditing Journal, 2006
... Abu Thahir Abdul Nasser, Faculty of Accountancy, University Technology Mara, Johor, Malaysia.... more ... Abu Thahir Abdul Nasser, Faculty of Accountancy, University Technology Mara, Johor, Malaysia. ... Dopuch, N. (1984), "The demand for quality-differentiated audit services in an agency-cost setting: an empirical investigation: discussion", in Abdel-Khalik, A., Solomon, I. (Eds ...