ORCID Profile
0000-0002-1481-1192
Current Organisations
Air University
,
UNSW Graduate Research School
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Publisher: Elsevier BV
Date: 11-2015
Publisher: American Chemical Society (ACS)
Date: 30-10-2017
Publisher: Elsevier BV
Date: 2019
Publisher: IEEE
Date: 2014
Publisher: Wiley
Date: 17-12-2020
Publisher: American Chemical Society (ACS)
Date: 16-12-2020
Publisher: Elsevier BV
Date: 08-2023
Publisher: Wiley
Date: 03-01-2023
Abstract: Magnetic 2D‐layered materials are promising for the applications of spintronic devices and compact magnetic devices. There are only a few reported intrinsic 2D‐based magnetic materials. Therefore, introducing magnetic element into 2D‐layered materials is an effective strategy to synthesize 2D‐layered magnetic materials. Recently, ferromagnetism has been realized by doping single transition‐metal or rare‐earth element, whereas, there is no report by codoping of both transition‐metal and rare‐earth elements. Herein, Co and Nd are codoped into MoS 2 ‐layered crystals by ion implantation. An extremely high magnetization of 6916.3 emu cm −3 at 10 K and 80.3 emu cm −3 at 300 K is achieved. The high magnetization is attributed to the contribution from both transition‐metal and rare‐earth elements as well as defects, such as vacancy of cation ions, anions, or interstitials. Hence, herein, a useful strategy may be opened to develop high‐performance magnetic materials based on 2D‐layered materials.
Publisher: Trans Tech Publications, Ltd.
Date: 09-2015
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.789-790.382
Abstract: This paper explicitly highlights the failure analysis and study of thin walled composite beams (multi-cell and multi-tapered) in cantilever configurations when subjected to constrained torsional load, using MSC Patran / Nastran finite element package. Initially, the verification of the model was done with the analytical results in order to ensure the model accuracy. All the multi-tapered beams under examination are composed of closed section and three cell configuration with twisting moment applied at the free end. There is a vivid description of all the effects of different composite material and various stacking sequences on the margin of safety and failure loads. This paper also verifies the influence of various geometrical configurations (Beam lengths, tapered angles and point of variation of tapered angles) of beams on the failure loads. This paper would help in the wing design phase of modern agile and high speed aircraft in which multi-cell closed cross section beams are integral part.
Publisher: Wiley
Date: 22-08-2019
Abstract: Introducing ferromagnetism in transition metal dichalcogenides has attracted lots of attention due to the possible applications in spintronics devices. Generally, single magnetic element doping is used to introduce magnetism. However, mostly, weak ferromagnetism is observed. In this work, codoping of two kinds of transition metals (Nb and Co) into WSe
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 2024
Publisher: Elsevier BV
Date: 05-2018
Publisher: American Chemical Society (ACS)
Date: 31-03-2020
Publisher: Springer Science and Business Media LLC
Date: 16-08-2017
Publisher: Trans Tech Publications, Ltd.
Date: 10-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.629.82
Abstract: This paper explicitly highlights the modal analysis of thin walled multi-cell multi-tapered composite beams in cantilever configurations, using MSC Patran / Nastran finite element package. Initially, the verification of the model was done with the analytical results in order to ensure the model accuracy. All the multi-tapered beams under examination are composed of closed section and three cell configuration. There is a vivid description of all the effects of composite material and stacking sequence on the modal frequencies. It also suggests the ways to shift the natural frequencies of the multi-tapered beams. This paper verifies the effects of different geometrical configurations of beams (tapered angles, lengths and point of variation of tapered angles) on the modal frequencies. This research is also useful in aerospace industry while designing the aircraft wing, which would experience the vibrations due to wind gust and engine cycles.
Publisher: Elsevier BV
Date: 10-2022
No related grants have been discovered for Sohail Ahmed.