title: New avenues to efficient chemical synthesis of exchange coupled hard/soft nanocomposite magnet.
abstract: Nd-Fe-B ultrafine amorphous alloy particles were prepared by reaction of metal ions with borohydride in aqueous solution. Monodispersed Fe nanoparticles were synthesized under an argon atmosphere via thermal decomposition of Fe(2+)-oleate2. Exchange coupled Nd2Fe14B/Fe nanocomposite magnets have been prepared by self-assembly using surfactant. The crystal structure of the synthesized nanoparticles was identified by using X-ray powder diffraction (XRD). The size and shape of nanoparticles were obtained by transmission electron microscope (TEM). Thermogravimetry using a microbalance with magnetic field gradient positioned below the sample was used for the measurement of a thermomagnetic analysis (TMA) curve showing the downward magnetic force versus temperature.
authors.affiliation: Cheil Industries Inc., Gocheon-Dong, Uiwang-Si, Gyeonggi-Do 437-711, Korea.
authors.forename: Don Keun
authors.initials: DK
authors.lastname: Lee
authors.forename: Hyun Gil
authors.initials: HG
authors.lastname: Cha
authors.forename: Young Hwan
authors.initials: YH
authors.lastname: Kim
authors.forename: Chang Woo
authors.initials: CW
authors.lastname: Kim
authors.forename: Eun Sun
authors.initials: ES
authors.lastname: Ji
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Kang