TY - JOUR
T1 - Directed magnetic field induced assembly of high magnetic moment cobalt nanowires
AU - Srivastava, Akhilesh Kumar
AU - Madhavi, S.
AU - Ramanujan, R.V.
PY - 2010
Y1 - 2010
N2 - A directed magnetic field induced assembly technique was employed to align two phase (h.c.p. + f.c.c.) cobalt nanoparticles in a mechanically robust long wire morphology. Co nanoparticles with an average size of 4.3 nm and saturation magnetization comparable to bulk cobalt were synthesized by borohydride reduction followed by size selection and magnetic field induced assembly. The coercivity of these nanowires was higher than their nanoparticle counterpart due to shape anisotropy. The experimental coercivity values of the nanowires were lower than the predictions of the coherent rotation, fanning and curling models of coercivity due to the preponderance of superparamagnetic particles with zero coercivity.
AB - A directed magnetic field induced assembly technique was employed to align two phase (h.c.p. + f.c.c.) cobalt nanoparticles in a mechanically robust long wire morphology. Co nanoparticles with an average size of 4.3 nm and saturation magnetization comparable to bulk cobalt were synthesized by borohydride reduction followed by size selection and magnetic field induced assembly. The coercivity of these nanowires was higher than their nanoparticle counterpart due to shape anisotropy. The experimental coercivity values of the nanowires were lower than the predictions of the coherent rotation, fanning and curling models of coercivity due to the preponderance of superparamagnetic particles with zero coercivity.
KW - Solid Oxide Fuel Cells
KW - Fuel Cells and hydrogen
KW - Brændselsceller og brint
U2 - 10.1007/s00339-009-5537-z
DO - 10.1007/s00339-009-5537-z
M3 - Journal article
VL - 98
SP - 821
EP - 830
JO - Applied Physics A: Materials Science & Processing
JF - Applied Physics A: Materials Science & Processing
SN - 0947-8396
IS - 4
ER -