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Title: (Ca,Na)(Zn,Mn){sub 2}As{sub 2}: A new spin and charge doping decoupled diluted ferromagnetic semiconductor

Here, we report the successful synthesis of a spin- and charge-decoupled diluted magnetic semiconductor (DMS) (Ca,Na)(Zn,Mn){sub 2}As{sub 2}, crystallizing into the hexagonal CaAl{sub 2}Si{sub 2} structure. The compound shows a ferromagnetic transition with a Curie temperature up to 33 K with 10% Na doping, which gives rise to carrier density of n{sub p} ∼ 10{sup 20 }cm{sup −3}. The new DMS is a soft magnetic material with H{sub C} < 400 Oe. The anomalous Hall effect is observed below the ferromagnetic ordering temperature. With increasing Mn doping, ferromagnetic order is accompanied by an interaction between the local spin and mobile charge, giving rise to a minimum in resistivity at low temperatures and localizing the conduction electrons. The system provides an ideal platform for studying the interaction of the local spins and conduction electrons.
Authors:
; ; ; ; ; ;  [1] ;  [1] ;  [2] ; ; ; ;  [3] ;  [4] ; ; ;  [5] ;  [6] ;  [7] ;  [8] more »;  [1] ;  [9] « less
  1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Beijing (China)
  2. (China)
  3. Department of Physics, Columbia University, New York, New York 10027 (United States)
  4. Department of Physics, Zhejiang University, Hangzhou 310027 (China)
  5. Department of Physics and Astronomy, McMaster University, Hamilton, L8S 4M1 (Canada)
  6. Department of Physics, Villanova University, Villanova, Pennsylvania 19085 (United States)
  7. Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
  8. Department of Physics, Tsinghua University, Beijing (China)
  9. (United States)
Publication Date:
OSTI Identifier:
22308163
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 16; Other Information: (c) 2014 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; ARSENIDES; CALCIUM COMPOUNDS; CARRIER DENSITY; CURIE POINT; ELECTRONS; FERROMAGNETIC MATERIALS; HALL EFFECT; INTERACTIONS; MAGNETIC MATERIALS; MAGNETIC SEMICONDUCTORS; MANGANESE COMPOUNDS; SODIUM COMPOUNDS; SPIN; SYNTHESIS; TEMPERATURE RANGE 0013-0065 K; ZINC COMPOUNDS