Journal
CHINESE PHYSICS B
Volume 20, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/20/12/127501
Keywords
Fe implanted; ZnO; ZnFe2O4; superparamagnetic
Categories
Funding
- National Basic Research Program of China [2010CB832904]
- National Natural Science Foundation of China [10875007, 11005005]
- Shaanxi University of Technology, China [SLQ0815]
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Fe ions of dose 8x10(16) cm(-2) are implanted into a ZnO single crystal at 180 keV. Annealing at 1073 K leads to the formation of zinc ferrite (ZnFe2O4), which is verified by synchrotron radiation X-ray diffraction (SR-XRD) and X-ray photoelectron spectroscopy (XPS). The crystallographically oriented ZnFe2O4 is formed inside the ZnO with the orientation relationship of ZnFe2O4 (111)//ZnO (0001). Superconducting quantum interference device (SQUID) measurements show that the as-implanted and post-annealing samples are both ferromagnetic at 5 K. The synthesized ZnFe2O4 is superparamagnetic, with a blocking temperature (T-B = 25 K), indicated by zero field cooling and field cooling (ZFC/FC) measurements.
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