Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 47, Issue 40, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/47/40/405002
Keywords
spintronics; organometal trihalide perovskites; magnetoresistance
Categories
Funding
- State Key Programme for Basic Research of China [2010CB923404, 2011CB922101]
- National Natural Science Foundation of China [51172044, 51322206, 11274060]
- Natural Science Foundation of Jiangsu Province of China [BK2011617]
- 333 project of Jiangsu province
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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Organometal trihalide perovskites with the general formula (CH3NH3)PbX3 (X is Cl, I and/or Br) have a composition dependent tunable band gap and long electron-hole diffusion length, which is not only being hotly studied for usage in hybrid solar cells, but also has potential application in organic spintronics. In this work, we prepared CH3NH3PbI3-coated Fe3O4 granular films. CH3NH3PbI3 behaves effectively as a spacer to decouple the Fe3O4 particles and spin-preserved transporting matrix. The magnetoresistance of Fe3O4 particles has been significantly enhanced after CH3NH3PbI3 coating, which is about -6% at 300 K and -10.8% at 150 K under a magnetic field of 10 kOe, about 3 times larger than the values of pure Fe3O4 (-1.9% at 300 K and -3.4% at 150 K).
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