TY - GEN
T1 - Plasma ion heating produces L10 FePt nanoclusters
AU - Patterson, Marlann Marinho
AU - Rui, Xiangxin
AU - Li, Xingzhong
AU - Shield, Jeff E.
AU - Sellmyer, David
PY - 2008
Y1 - 2008
N2 - In this study, cubic and spherical FePt clusters were created by inert gas condensation in an argon-helium dc sputter discharge under different flow and target power conditions. The plasma recipes for spherical and cubic clusters called for high He:Ar ratio, low target power and low He:Ar ratio, high target power, respectively. As expected, Langmuir probe measurements show the recipes led to larger ion density for the cubic case (2 × 108 cm" versus 6 × 106 cm-3 for spherical). We conclude that the larger density of argon ions increased the cluster-ion collision probability, heating the clusters in situ to promote atomic rearrangements and the formation of the ordered L10 crystal structure rather than the disordered fcc structure.
AB - In this study, cubic and spherical FePt clusters were created by inert gas condensation in an argon-helium dc sputter discharge under different flow and target power conditions. The plasma recipes for spherical and cubic clusters called for high He:Ar ratio, low target power and low He:Ar ratio, high target power, respectively. As expected, Langmuir probe measurements show the recipes led to larger ion density for the cubic case (2 × 108 cm" versus 6 × 106 cm-3 for spherical). We conclude that the larger density of argon ions increased the cluster-ion collision probability, heating the clusters in situ to promote atomic rearrangements and the formation of the ordered L10 crystal structure rather than the disordered fcc structure.
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U2 - 10.1557/proc-1087-v08-08
DO - 10.1557/proc-1087-v08-08
M3 - Conference contribution
AN - SCOPUS:70449638274
SN - 9781605608747
T3 - Materials Research Society Symposium Proceedings
SP - 66
EP - 71
BT - Materials Research Society Symposium Proceedings - Crystal-Shape Control and Shape-Dependent Properties-Methods, Mechanism, Theory and Simulation
PB - Materials Research Society
T2 - Crystal-Shape Control and Shape-Dependent Properties-Methods, Mechanism, Theory and Simulation
Y2 - 24 March 2008 through 28 March 2008
ER -