Effects of N-Doping on Magnetic Properties of ZnCoO Diluted Magnetic Semiconductor Thin Films

Lee, Yu‐Hua; Lee, J C; Su, C. W.

doi:10.1109/tmag.2010.2041045

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…But XRD peaks shift toward lower angles with N co-doping along with Cr in ZnO. Crystalline structure of the samples does not change but the quality spoils with the substitution of O by N, because the ionic radii of N (1.71 Å ) is larger than that of O (1.40 Å ) (Lee et al 2010). The mean crystallite size in the samples was estimated using Scherrer formula.…”

Section: Resultsmentioning

confidence: 99%

Enhanced magnetism in Cr-doped ZnO nanoparticles with nitrogen co-doping synthesized using sol–gel technique

et al. 2014

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Pure ZnO and 2 % Cr-doped ZnO nanoparticles were synthesized by sol-gel technique. Powder X-ray diffraction reveals that Cr incorporates into the ZnO crystal lattice without disturbing the original hexagonal structure. Transmission electron microscopy measurements show that the average size of these nanoparticles is in the range 20-25 nm. Pure ZnO nanoparticles exhibit diamagnetism while Cr-doped ZnO exhibit saturated hysteresis loop at room temperature indicating ferromagnetic behavior. Nitrogen co-doping along with Cr in ZnO shows enhanced ferromagnetism with small antiferromagnetism.

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Section: Resultsmentioning

confidence: 99%

Enhanced magnetism in Cr-doped ZnO nanoparticles with nitrogen co-doping synthesized using sol–gel technique

et al. 2014

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“…4(c) and (d) exhibit M-T behavior (a fast and then a slow decrease of M with increasing T) that are similar for zfc and fc, but the curves do not coincide. This kind of M-T behavior for both n-and p-type films exhibits no feature of blocking temperature and is not superparamagnetic, according to our previous work [18,19]. Thus, we tried to describe the fc curve using 3-D Fig.…”

Section: Resultsmentioning

confidence: 94%

Comparison of ferromagnetism in n- and p-type magnetic semiconductor thin films of ZnCoO

Lee

Min

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…Recently, magnetic properties of rf-sputtered ZnCoO and ZnCoNO MS¯lms were compared. 8 N-doping in Co:ZnO¯lms exhibits poorly p-type conductivity and paramagnetic. A superparamagnetic behavior in the grown¯lm is observed with increasing the doping content of nitrogen.…”

Section: Introductionmentioning

confidence: 99%

MAGNETO-OPTIC FARADAY EFFECT ON SPIN ANISOTROPIC Co ULTRATHIN FILMS AND POST-NITRIDIZATION ON ZnO(002) CRYSTAL

Chang

2012

SPIN

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Perpendicular magnetic anisotropy in the initial growth of epitaxial in-plane anisotropic Co ultrathin films on the ZnO (002) crystal surface was discovered. The critical thickness of weak spin reorientation transition phenomenon in deposition process from in-plane to out-of-plane magnetic anisotropy is around 2 nm. Ultrathin 1.2 nm Co film was stabilized by post-irradiation of low-energy N ions from the observation of hysteresis loop transforming from an S-shape soft magnetic state to a square hard magnetic state. The addition of N affected the magnetic behavior. The time-dependent nitridization process was observed using Auger electron spectroscopy. Magneto-optical Faraday effect measurements were used to observe the magnetic properties of high-transmission Co/ZnO (002) and Co–N/ZnO (002) surface. A strong polar magneto-optic Faraday effect was dominated in the 2.0–4.0 nm Co/ZnO (002) surfaces. From the N+ implantation that reduces the corresponding coercivity, a hexagonal c-axis lattice structure of Co with a preferred perpendicular anisotropy on the ZnO (002) surface may be explained.

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Effects of N-Doping on Magnetic Properties of ZnCoO Diluted Magnetic Semiconductor Thin Films

Cited by 7 publications

References 21 publications

Enhanced magnetism in Cr-doped ZnO nanoparticles with nitrogen co-doping synthesized using sol–gel technique

Enhanced magnetism in Cr-doped ZnO nanoparticles with nitrogen co-doping synthesized using sol–gel technique

Comparison of ferromagnetism in n- and p-type magnetic semiconductor thin films of ZnCoO

MAGNETO-OPTIC FARADAY EFFECT ON SPIN ANISOTROPIC Co ULTRATHIN FILMS AND POST-NITRIDIZATION ON ZnO(002) CRYSTAL

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