Structure and Spin-Glass Properties of Cd0.5Mi0.5S Diluted Magnetic Semiconductor Quantum Dots

R. J. Bandaranayake, J. Y. Lin, H. X. Jiang, C. M. Sorensen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Cd0.5Mn0.5S diluted magnetic semiconductor (DMS) quantum dots (QDs) of crystallite size ranging from 24 Å to the bulk have been chemically synthesized using an aqueous solution precipitation method and thermal annealing. Subsequent characterization indicates that the, “as prepared” material is of the cubic zinc blende structure which evolves with increasing size to the bulk hexagonal wurtzite structure. Magnetic properties of the DMS QDs have been measured with a SQUID magnetometer. A transition from a paramagnetic to a spin-glass (SG) state at a critical temperature Tf has been observed. Size dependence measurements on Tf indicate a minimum size for SG formation. Relaxation in isothermal remanent magnetization has also been measured and shows a power law decay.

Original languageEnglish
Pages (from-to)3761-3763
Number of pages3
JournalIEEE Transactions on Magnetics
Volume31
Issue number6
DOIs
StatePublished - Nov 1995

Fingerprint Dive into the research topics of 'Structure and Spin-Glass Properties of Cd<sub>0.5</sub>Mi<sub>0.5</sub>S Diluted Magnetic Semiconductor Quantum Dots'. Together they form a unique fingerprint.

Cite this