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Browsing Physics & Energy by Author "Coey, John Michael David"

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Browsing Physics & Energy by Author "Coey, John Michael David"

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  • 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.; 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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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