Issue |
EPL
Volume 104, Number 1, October 2013
|
|
---|---|---|
Article Number | 17002 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/104/17002 | |
Published online | 23 October 2013 |
Large low-temperature magnetoresistance in SrFe2As2 single crystals
1 Callaghan Innovation Research Limited - P.O. Box 31310, Lower Hutt 5040, New Zealand
2 MacDiarmid Institute, School of Chemical and Physical Sciences, Victoria University of Wellington P.O. Box 600, Wellington 6140, New Zealand
3 National Isotope Centre, GNS Science - P.O. Box 31312, Lower Hutt 5040, New Zealand
4 Institute of Materials Science and Graduate School of Pure & Applied Sciences, University of Tsukuba 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573, Japan
(a) Shen.Chong@callaghaninnovation.govt.nz
Received: 18 July 2013
Accepted: 26 September 2013
We present the first report on a large low-temperature magnetoresistance (MR) of more than 1600% in a SrFe2As2 single crystal and 1300% in a low-energy Ca ion-implanted SrFe2As2 single crystal that occurs before the emergence of crystallographic strain-induced bulk superconductivity arising from a sample aging effect. In accordance to band structure calculations from the literature, which consitently show that more than 2 bands are involved in the transport, we have modeled this large MR at high fields using a 3-carrier scenario rather than solely on quantum linear MR model generally used to explain the MR in iron-pnictides. At and below 20 K the large MR may be due to 3-carrier transport in an inhomogeneous state where there are superconducting and metallic regions.
PACS: 74.70.Xa – Pnictides and chalcogenides / 73.43.Qt – Magnetoresistance / 74.81.-g – Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.