D. Joshi, D. Harish, S. Nayak, D. Roy, M. Qureshi, R. L. N. Saiprasad, T. Shiyani, D. Pamu, S. Thota
{"title":"Zn1−xNixO/NiO两相纳米复合材料的生长机理及电子自旋共振研究","authors":"D. Joshi, D. Harish, S. Nayak, D. Roy, M. Qureshi, R. L. N. Saiprasad, T. Shiyani, D. Pamu, S. Thota","doi":"10.1109/ICEMELEC.2014.7151180","DOIUrl":null,"url":null,"abstract":"Two-phase nanocomposites comprised of Zn<sub>1-x</sub>Ni<sub>x</sub>O/NiO (0.05 ≤ x ≤ 0.3) were grown by using sol-gel process with hydrated metal acetates as precursors. Thermal decomposition of the co-precipitated oxalate α-ZnNi(C<sub>2</sub>O<sub>4</sub>) yields wurtzite h.c.p. Zn<sub>1-x</sub>Ni<sub>x</sub>O and f.c.c. NiO together. The X-band electron spin resonance spectra provide the signatures of anisotropic spin interactions with long-range magnetic ordering at 300 K. The temperature variation (120 K ≤ T ≤ 300 K) of the resonance field H<sub>R</sub>(T) and line-width ΔH<sub>PP</sub>(T) depicts a clear anomaly across 140 K associated with the blocking/freezing effects and the contribution of additional surface anisotropy (K<sub>eff</sub>) present in the system. Both H<sub>R</sub>(T) and ΔH<sub>PP</sub>(T) follows the power-law variation δH<sub>R</sub> = (ΔH<sub>PP</sub>)<sup>n</sup> with n ≃ 2.13, as expected for partially oriented nanocrystallites.","PeriodicalId":186054,"journal":{"name":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Growth mechanism and electron spin resonance studies of Zn1−xNixO/NiO two-phase nanocomposite\",\"authors\":\"D. Joshi, D. Harish, S. Nayak, D. Roy, M. Qureshi, R. L. N. Saiprasad, T. Shiyani, D. Pamu, S. Thota\",\"doi\":\"10.1109/ICEMELEC.2014.7151180\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two-phase nanocomposites comprised of Zn<sub>1-x</sub>Ni<sub>x</sub>O/NiO (0.05 ≤ x ≤ 0.3) were grown by using sol-gel process with hydrated metal acetates as precursors. Thermal decomposition of the co-precipitated oxalate α-ZnNi(C<sub>2</sub>O<sub>4</sub>) yields wurtzite h.c.p. Zn<sub>1-x</sub>Ni<sub>x</sub>O and f.c.c. NiO together. The X-band electron spin resonance spectra provide the signatures of anisotropic spin interactions with long-range magnetic ordering at 300 K. The temperature variation (120 K ≤ T ≤ 300 K) of the resonance field H<sub>R</sub>(T) and line-width ΔH<sub>PP</sub>(T) depicts a clear anomaly across 140 K associated with the blocking/freezing effects and the contribution of additional surface anisotropy (K<sub>eff</sub>) present in the system. Both H<sub>R</sub>(T) and ΔH<sub>PP</sub>(T) follows the power-law variation δH<sub>R</sub> = (ΔH<sub>PP</sub>)<sup>n</sup> with n ≃ 2.13, as expected for partially oriented nanocrystallites.\",\"PeriodicalId\":186054,\"journal\":{\"name\":\"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)\",\"volume\":\"15 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICEMELEC.2014.7151180\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 IEEE 2nd International Conference on Emerging Electronics (ICEE)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICEMELEC.2014.7151180","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Growth mechanism and electron spin resonance studies of Zn1−xNixO/NiO two-phase nanocomposite
Two-phase nanocomposites comprised of Zn1-xNixO/NiO (0.05 ≤ x ≤ 0.3) were grown by using sol-gel process with hydrated metal acetates as precursors. Thermal decomposition of the co-precipitated oxalate α-ZnNi(C2O4) yields wurtzite h.c.p. Zn1-xNixO and f.c.c. NiO together. The X-band electron spin resonance spectra provide the signatures of anisotropic spin interactions with long-range magnetic ordering at 300 K. The temperature variation (120 K ≤ T ≤ 300 K) of the resonance field HR(T) and line-width ΔHPP(T) depicts a clear anomaly across 140 K associated with the blocking/freezing effects and the contribution of additional surface anisotropy (Keff) present in the system. Both HR(T) and ΔHPP(T) follows the power-law variation δHR = (ΔHPP)n with n ≃ 2.13, as expected for partially oriented nanocrystallites.
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