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Title: K and Mn co-doped BaCd{sub 2}As{sub 2}: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance

A bulk diluted magnetic semiconductor was found in the K and Mn co-doped BaCd{sub 2}As{sub 2} system. Different from recently reported tetragonal ThCr{sub 2}Si{sub 2}-structured II-II-V based (Ba,K)(Zn,Mn){sub 2}As{sub 2}, the Ba{sub 1−y}K{sub y}Cd{sub 2−x}Mn{sub x}As{sub 2} system has a hexagonal CaAl{sub 2}Si{sub 2}-type structure with the Cd{sub 2}As{sub 2} layer forming a honeycomb-like network. The Mn concentration reaches up to x ∼ 0.4. Magnetization measurements show that the samples undergo ferromagnetic transitions with Curie temperature up to 16 K. With low coercive field of less than 10 Oe and large magnetoresistance of about −70%, the hexagonal structured Ba{sub 1−y}K{sub y}Cd{sub 2−x}Mn{sub x}As{sub 2} can be served as a promising candidate for spin manipulations.
Authors:
; ; ; ; ; ; ; ;  [1] ; ; ;  [2]
  1. Department of Physics and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027 (China)
  2. Department of Physics, Hangzhou Normal University, Hangzhou 310036 (China)
Publication Date:
OSTI Identifier:
22266162
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 22; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; ABUNDANCE; CONCENTRATION RATIO; CURIE POINT; DOPED MATERIALS; MAGNETIC SEMICONDUCTORS; MAGNETORESISTANCE; SPIN; X-RAY SPECTROSCOPY