Synthesis and magnetic characterization of MnAs nanoparticles via nanoparticle conversion

M. F. H. Wolff, D. Gorlitz, K. Nielsch, Maria Messing, Knut Deppert

Research output: Contribution to journalArticlepeer-review

13 Citations (SciVal)

Abstract

We report on the synthesis of ferromagnetic manganese arsenide (MnAs) nanoparticles via the conversion of primary Mn particles which are generated in an aerosol process in a spark discharge generator. After sintering and size selection in an aerosol setup, the particles are deposited on GaAs(100) B and Si(111) substrates. Subsequent conversion to MnAs particles takes place in an annealing process under a hydrogen atmosphere with an arsine background pressure. The magnetic properties are studied using a SQUID magnetometer. The annealed MnAs particles exhibit hexagonal facets and show anisotropic magnetic behaviour on GaAs(100) B substrates, whereas on Si(111) they remain spherical and show isotropic magnetic behaviour. Scanning transmission electron microscopy studies are used to confirm the conversion from Mn to MnAs.
Original languageEnglish
Article number055602
JournalNanotechnology
Volume22
Issue number5
DOIs
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Nano Technology

Fingerprint

Dive into the research topics of 'Synthesis and magnetic characterization of MnAs nanoparticles via nanoparticle conversion'. Together they form a unique fingerprint.

Cite this