BROWSE

Related Researcher

Author's Photo

Seo, Kwanyong
The SEO Group
Research Interests
  • Flexible solar cell, transparent solar cell, PV-battery hybrid system, hetero-junction solar cell

ITEM VIEW & DOWNLOAD

Magnetotransport Properties and Kondo Effect Observed in a Ferromagnetic Single Crystalline Fe1-xCoxSi Nanowire

Cited 1 times inthomson ciCited 1 times inthomson ci
Title
Magnetotransport Properties and Kondo Effect Observed in a Ferromagnetic Single Crystalline Fe1-xCoxSi Nanowire
Author
Lee, SunghunIn, JunehoChang, Jung-WonSeo, KwanyongJung, Myung-HwaKim, JinheeKim, Bongsoo
Keywords
electron transfer; iron; Kondo effect; magnetic properties; nanostructures
Issue Date
2012
Publisher
WILEY-V C H VERLAG GMBH
Citation
CHEMISTRY-AN ASIAN JOURNAL, v.7, no., pp.406 - 411
Abstract
We report unconventional magnetotransport properties of an individual Fe 1-xCo xSi nanowire. We have studied the dependence of the resistivity on the angle between the directions of the magnetization and electrical current below the Curie temperature (T C). The observed anisotropic magnetoresistance (MR) ratio is negative, thereby indicating that the conduction electrons in a minority spin band of the Fe 1-xCo xSi nanowire dominantly contribute to the transport. Unlike typical ferromagnets, positive MR is observed in the overall temperature range. MR curves are linear below T C and show a quadratic form above T C, which can be explained by the change of density of states that arises as the band structures of the Fe 1-xCo xSi nanowire shift under a magnetic field. The temperature dependence of the resistivity curve is sufficiently explained by the Kondo effect. The Kondo temperature of the Fe 1-xCo xSi nanowire is lower than that of the bulk state due to suppression of the Kondo effect. The high single crystallinity of Fe 1-xCo xSi nanowires allowed us to observe and interpret quite subtle variations in the prominent intrinsic transport properties. Down to the wire: Ferromagnetic single-crystalline Fe 1-xCo xSi nanowires (NWs) were synthesized by means of a vapor transport method with no catalyst. The magnetotransport properties of the Fe 1-xCo xSi NW reveal negative anisotropic magnetoresistance owing to dominant spin-down electrons. The various results (see figure) are of interest for spintronic devices. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
Go to Link
DOI
10.1002/asia.201100679
ISSN
1861-4728
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
129.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU