NDLI: Ferromagnetism in new diluted magnetic semiconductor Si/sub 1-x/Mn/sub x/Te/sub 1.5/ crystals

Content Provider	IEEE Xplore Digital Library
Author	Hwang, Y.H. Kim, H.K. Cho, S. Um, Y.H.
Copyright Year	2005
Description	Author affiliation: Dept. of Phys., Ulsan Univ., South Korea (Hwang, Y.H.; Kim, H.K.; Cho, S.; Um, Y.H.)
Abstract	In this work, magnetic and electrical properties of the Si/sub 1-x/Mn/sub x/Te/sub 1.5/ (x=0.05, 0.11, 0.21, 0.31) diluted magnetic semiconductors and the effect of Mn-substitution are studied. XRD measurements of the samples reveal no impurity peaks and the lattice constants increase with Mn concentration, possibly due to the larger Mn atomic radius than Si. The magnetic and electrical properties of the samples are determined from superconducting quantum interference device (SQUID) magnetometry and magnetotransport measurements. Results show that magnetization of the samples increases with increasing Mn content. A transition to a state of long-range magnetic order is found at T/sub C/ = 82/spl plusmn/2 K. Increasing Mn content (x>0.05) results in a ferromagnetic-paramagnetic transition around 280 K. At 250 K, magnetization loops indicate that the crystals are ferromagnets and the coercive field increases with increasing Mn concentration. Also, large magnetic moments observed in these crystals indicate that the spin-spin interaction is enhanced by the addition of Mn.
Sponsorship	Magnetics Soc. of Japan Magnetics Soc. of the IEEE
Starting Page	257
Ending Page	258
File Size	180319
Page Count	2
File Format	PDF
ISBN	0780390091
DOI	10.1109/INTMAG.2005.1463557
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-04
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic semiconductors Superconducting magnets Atomic measurements Magnetic devices Magnetic properties Electric variables measurement SQUIDs Magnetization Crystals Tellurium
Content Type	Text
Resource Type	Article

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