Browsing by Subject "Coercive force"

Now showing items 1-8 of 8

    • Effects of particle size and composition on coercivity of Sm–Co nanoparticles prepared by surfactant-assisted ball milling 

      Poudyal, Narayan; Rong, Chuan-Bing; Liu, J. Ping (American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2010-04-15)
      The correlation between the recoil loop openness and the activation volume has been studied for the SmCo5/α-Fe nanocomposite powder material prepared by mechanical alloying. The α-Fe phase content in the nanocomposite ...

    • Mechanism of the anomalous temperature dependence of coercivity in Sm(Co, Fe, Cu, Zr)z high temperature magnets 

      Rong, Chuan-Bing; Shen, Bao-Gen; Zhang, Hong-Wei; Liu, J. Ping (AIP, 2006)
      Coercivity mechanism of the precipitation-hardened Sm Co,Fe,Cu,Zr z high-temperature magnets was found to vary with temperature by measurements of reversible magnetization. The magnetization reversal is mainly controlled ...

    • Mechanism of the anomalous temperature dependence of coercivity in Sm(Co,Fe,Cu,Zr)[subscript]z high-temperature magnets 

      Rong, Chuan-Bing; Zhang, Hong-wei; Shen, Bao-gen; Liu, J. Ping (American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2006-01-24)
      Coercivity mechanism of the precipitation-hardened Sm(Co,Fe,Cu,Zr)z high-temperature magnets was found to vary with temperature by measurements of reversible magnetization. The magnetization reversal is mainly controlled ...

    • Microstructures and magnetic alignment of L10 FePt nanoparticles 

      Nandwana, Vikas; Kang, Shishou; Shi, Shifan; Jia, Zhiyong; Thompson, G. R.; Nikles, David E.; Harrell, J. W.; Poudyal, Narayan; Liu, J. Ping (AIP, 2009)
      Chemically ordered FePt nanoparticles were obtained by high temperature annealing a mixture of FePt particles with NaCl. After the NaCl was removed with de-ionized water, the transformed FePt nanoparticles were redispersed ...

    • Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles 

      Liu, J. Ping; Rong, Chuan-Bing; Nandwana, Vikas; Poudyal, Narayan; Chaubey, Girija Shankar (IEEEDepartment of Physics, The University of Texas at Arlington, 2009-03-31)
      Isolated monodisperse L1[subscript]0 FePt nanoparticles coated by carbon were obtained by adding enough surfactants that decomposed into carbon after the chemical synthesis and postannealing of the A1 FePt nanoparticles. ...

    • Rapid thermal annealing of FePt nanoparticles 

      Yano, Kazuaki; Nandwana, Vikas; Poudyal, Narayan; Rong, Chuan-Bing; Liu, J. Ping (American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2008-07-11)
      We report a systematic study on rapid thermal annealing (RTA) of FePt nanoparticles. FePt particles with an average size of 8 nm were synthesized by a chemical solution method, and then annealed using RTA and conventional ...

    • Rapid thermal annealing of FePt nanoparticles 

      Nandwana, Vikas; Yano, Kazuaki; Poudyal, Narayan; Rong, Chuan-Bing; Liu, J. Ping (AIP, 2008-07-01)
      We report a systematic study on rapid thermal annealing (RTA) of FePt nanoparticles. FePt particles with an average size of 8 nm were synthesized by a chemical solution method, and then annealed using RTA and conventional ...

    • Shape control of FePt nanocrystals 

      Poudyal, Narayan; Chaubey, Girija Shankar; Rong, Chuan-Bing; Liu, J. Ping (American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2009-04-06)
      : FePt nanocrystals were prepared by simultaneous reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl in properly chosen solvents/surfactants. A variety of FePt nanocrystals, including ...