Enhanced capability in a gas aggregation source for magnetic nanoparticles | Zendy

Gail N. Iles | Zendy; S.H. Baker | Zendy; S. C. Thornton | Zendy; C. Binns | Zendy

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Enhanced capability in a gas aggregation source for magnetic nanoparticles

Author(s) -

Gail N. Iles,

S.H. Baker,

S. C. Thornton,

C. Binns

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3067761

Subject(s) - cluster (spacecraft) , quadrupole mass analyzer , quadrupole , crucible (geodemography) , mass spectrometry , nanoparticle , flux (metallurgy) , materials science , characterization (materials science) , analytical chemistry (journal) , chemistry , chemical physics , nanotechnology , atomic physics , metallurgy , environmental chemistry , physics , computational chemistry , chromatography , computer science , programming language

We describe the characterization of a high-temperature (2000 K) thermal gas aggregation source that is ultrahigh vacuum compatible and can cleanly deposit transition metal clusters with partial pressures of contaminants in the 10(-11) mbar range allowing codeposition with highly reactive matrices. In particular, we investigate the effect of varying (i) the bath gas pressure and composition on the size distribution and flux of clusters produced and (ii) the position of the crucible within the source. The mass spectra of Fe clusters produced, recorded using a quadrupole filter, show that changing the operating conditions and configuration of the source allow a wide range of cluster sizes-3000-320 000 amu (similar to 50-6000 atoms for Fe or Co) to be produced. We demonstrate the cleanliness of the source by producing uncontaminated Fe clusters in rare-earth matrices.Peer-reviewedPublisher Version855

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