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Browsing by Author "Rhen, Fernando M.F."

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Browsing by Author "Rhen, Fernando M.F."

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  • Kelly, Sean; Collins, Christina; Duffy, Meave; Rhen, Fernando M.F.; Roy, Saibal (IEEE Computer Society, 2007)
    The application of PCB integrated electroplated cores for VRM inductors is proposed, where the motivation is to increase frequencies beyond 1 MHz so that VRM transient response can be improved. It is shown that electroplated ...
  • Rhen, Fernando M.F.; Roy, Saibal (American Institute of Physics, 2008)
    The magnetic properties of electrodeposited CoNiFe films with thicknesses varying from 0.20 to 10 µm were studied. The films show a single face-centered-cubic CoNiFe phase with grain sizes ranging from 23 to 29 nm. The ...
  • Venkatesan, Munuswamy; Rhen, Fernando M.F.; Gunning, Robert D.; Coey, John Michael David (IEEE Computer Society, 2009)
    The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500°C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)7 magnets crystallized in the TbCu7-type structure ...
  • Rhen, Fernando M.F.; Venkatesan, Munuswamy; Harris, I. Rex; Coey, John Michael David (American Institute of Physics, 2003)
    This work focuses on a search for magnets that can be used at elevated temperature. We have studied the effect of ZrB2 addition on the magnetic properties and stability of nanocrystalline 1:7 type Sm(Co,Ti,Zr) magnets up ...
  • Rhen, Fernando M.F.; Roy, Saibal (IEEE Computer Society, 2008)
    We have studied the influence of P and of plating current density on static/dynamic magnetic and electrical properties of CoNiFe high moment alloy. We found that morphology, electrical and magnetic properties of films with ...
  • Rhen, Fernando M.F.; Hinds, Gareth; O'Reilly, Cora; Coey, John Michael David (Institute of Electrical and Electronics Engineers, 2003)
    A novel bath for electrodepositing FePt films was developed and films were electrodeposited on copper substrates with thickness up to 0.45 m. The magnetic and structural properties of the films were measured. The films ...
  • Rhen, Fernando M.F.; Coey, John Michael David (Elsevier, 2008)
    We report the preparation, characterization of structure and magnetic properties of electrodeposited L1 0 FePt films with high coercivity. Equiatomic as-deposited films are nanocrystalline, soft and magnetically isotropic. ...
  • Rhen, Fernando M.F.; Coey, John Michael David (Elsevier B.V., 2009)
    We report the preparation, characterization of structure and magnetic properties of electrodeposited L1 0 FePt films with high coercivity. Equiatomic as-deposited films are nanocrystalline, soft and magnetically isotropic. ...
  • Venkatesan, Munuswamy; Varadaraju, Upadhyayula V.; Douvalis, Alexios P.; Fitzgerald, Ciara B.; Rhen, Fernando M.F.; Coey, John Michael David (Royal Society of Chemistry, 2002)
    A novel method of producing magnetoresistive oxides is described, which involves low temperature combustion synthesis from a mixture of nitrates and fuel, as applied to Sr2FeMoO6. The method yields ceramics with a fine ...
  • Cespedes, Oscar; Luu, A.; Rhen, Fernando M.F.; Coey, John Michael David (IEEE Computer Society, 2008)
    A method is described for the fabrication of magnetic force microscopy tips via localized electrodeposition and focused ion beam milling departing from commercial tapping mode tips. Very high aspect ratios and interacting ...
  • Duffy, Meave; Collins, Christina; Rhen, Fernando M.F.; McCloskey, P.; Roy, Saibal (IEEE Computer Society, 2008)
    High current inductor applications operating in the MHz range are generally limited to Voltage Regulator Modules (VRM’s) and Point of Load (POL) power supplies, where the issue of fast transient response demands reduced ...
  • Rhen, Fernando M.F.; Fernandez, Damaris; Hinds, Gareth; Coey, John Michael David (The Electrochemical Society, 2006)
    The influence of an external magnetic field on the rest potential ΔE0 of ferromagnetic and nonferromagnetic electrodes is studied. The shift E0 is measured as a function of magnetic field magnitude and direction, pH, ...
  • Sina, Soltanmohammad (Univesity of Limerick, 2013)
    In this thesis, we study the influence of a buffer layer (Ta, Cr, W, Ti) on the structure formation, crystallographic orientation, resistivity and magnetic properties of NiFe alloy in the form of bilayer and multilayer ...
  • Hinds, Gareth; Rhen, Fernando M.F.; Coey, John Michael David (IEEE Computer Society, 2002)
    The application of a magnetic field unexpectedly alters the rest potential of ferromagnetic electrodes in paramagnetic solutions of their salts. Anodic shifts of up to 60 mV in a field of 1 tesla were observed for 1M iron ...
  • Romero, S.A.; Cornejo, D.R.; Rhen, Fernando M.F.; Neiva, A.C.; Tabacniks, M.H.; Missell, F.P. (American Institute of Physics, 2000)
    SmCo films with a Cr underlayer have been investigated as potentially attractive candidates for high density recording media. Magnetron sputtering was used here to produce Cr/SmCox/Cr films on Si (100) substrates. The ...
  • Razee, Kafil M; Rhen, Fernando M.F.; Roy, Saibal (American Institute of Physics, 2009)
    We have investigated the magnetic properties of electroplated nickel nanowires with very distinct nanostructures, which are obtained by simply changing the plating temperature of the electrolyte. Low temperature (40°C) ...
  • O'Reilly, Cora; Sanvito, Stefano; Rhen, Fernando M.F.; Stamenov, Plamen; Coey, John Michael David (American Institute of Physics, 2006)
    The magnetization of nickel foils electrodeposited under different conditions was not usually found to differ significantly from that of the bulk (55.4 Am2 kg−1). However, some galvanostatically deposited films from a ...
  • O'Donnell, Terence; Wang, Ningning; Meere, Ronan; Rhen, Fernando M.F.; Roy, Saibal; O'Sullivan, Denis; Ó Mathúna, Cian (IEEE Computer Society, 2008)
    This paper presents the design and measured results for micro-fabricated inductors suitable for use in high frequency (> 10 MHz), low power (1 –2 W) dc-dc converters. The design has focused on maximizing inductor efficiency ...
  • Rhen, Fernando M.F.; Backen, E.; Coey, John Michael David (American Institute of Physics, 2005)
    Thick films of nearly equiatomic Co–Pt produced by electrodeposition into nanoporous membranes exhibit an isotropic magnetic phase with square hysteresis loops (Mr/Ms=0.95) and coercivity of up to 1.3 T. The initial ...

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