No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
Magnetic and nonlinear optical properties of BaTiO3
3.D Cao, M Q Cai, W Y Hu, P Yu, and H T Huang, “Vacancy-induced magnetism in BaTiO3(001) thin films based on density functional theory,” Phys. Chem. Chem. Phys. 13, 4738-4745 (2011).
5.K Potzger, J Osten, A A Levin, A Shalimov, G Talut, H Reuther, S Arpaci, D Burger, H Schmidt, T Nestler, and D C Meyer, “Defect-induced ferromagnetism in crystalline SrTiO3,” J. Magn. Magn. Mater. 323(11), 1551-1561 (2011).
6.Shilpi Banerjee, Anindya Datta, Asim Bhaumik, and Dipankar Chakravorty, “Multiferroic behaviour of nanoporous BaTiO3,” J. Appl. Phys. 110, 064316 (2011).
8.Peng Zhan, Zheng Xie, Zhengcao Li, Weipeng Wang, Zhengjun Zhang, Zhuoxin Li, Guodong Cheng, Peng Zhang, Baoyi Wang, and Xingzhong Cao, “Origin of the defects-induced ferromagnetism in un-doped ZnO single crystals,” Appl. Phys. Lett. 102, 071914 (2013).
9.P Crespo, R Litra’n, T C Rojas, M Multigner, J M de la Fuente, J C Sa’nchez-Lo’pez, M A Garcı’a, A Hernando, S Penade’s, and A Ferna’ndez, “Permanent Magnetism, Magnetic Anisotropy, and Hysteresis of Thiol-Capped Gold Nanoparticles,” Phys. Rev. Lett. 93, 087204 (2004).
10.Shengqiang Zhou, E. Čižmár, K. Potzger, M. Krause, G. Talut, M. Helm, J. Fassbender, S. A. Zvyagin, J. Wosnitza, and H. Schmidt, “Origin of magnetic moments in defective TiO2 single crystals,” Phys. Rev. B 79, 113201 (2009).
11.Nguyen Hoa Hong, Joe Sakai, Nathalie Poirot, and Virginie Brizé, “Room-temperature ferromagnetism observed in undoped semiconducting and insulating oxide thin films,” Phys. Rev. B 73, 132404 (2006).
12.Soack Dae Yoon, Yajie Chen, Aria Yang, Trevor L Goodrich, Xu Zuo, Dario A Arena, Katherine Ziemer, Carmine Vittoria, and Vincent G Harris, “Oxygen-defect-induced magnetism to 880 K in semiconducting anatase TiO2−δ films,” J. Phys.: Condens. Matter 18, L355 (2006).
14.A Sundaresan, R Bhargavi, N Rangarajan, U Siddesh, and C N R Rao, “Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides,” Phys. Rev. B 74, 161306R (2006).
15.N V Dang, T-L Phan, T D Thanh, V D Lam, and L V Hong, “Structural phase separation and optical and magnetic properties of BaTi1–xMnxO3 multiferroics,” Appl. Phys. Lett. 111, 113913 (2012).
17.K Ando, H Saito, Z Jin, T Fukumura, M Kawasaki, Y Matsumoto, and H Koinuma, “Large magneto-optical effect in an oxide diluted magnetic semiconductorZn1-xCoxO,” Appl. Phys. Lett. 78, 7200 (2001).
19.Ashutosh Tiwari, Michael Snure, Dhananjay Kumar, and Jeremiah T. Abiade, “Ferromagnetism in Cu-doped ZnO films: Role of charge carriers,” Appl. Phys. Lett. 92, 062509 (2008).
20.D Chakraborti, J Narayan, and J T Prater, “Room temperature ferromagnetism in Zn1–xCuxO thin films,” Appl. Phys. Lett. 90, 062504 (2007).
21.S E Thomas Wolfram, Electronic and optical properties of d-band perovskites (Cambridge University Press, New York, 2006).
22.Hyeon-Jun Lee, Bo-Seong Kim, Chae Ryong Cho, and Se-Young Jeong, “A study of magnetic and optical properties of Cu-doped ZnO,” Phys. Stat. Sol. (b) 241, 1533 (2004).
23.Y S Wang, P J Thomas, and P O Brien, “Optical Properties of ZnO Nanocrystals Doped with Cd, Mg, Mn, and Fe Ions,” J. Phys. Chem. B 110, 21412 (2006).
24.Ranjani Viswanatha, Sameer Sapra, Subhra Sen Gupta, B. Satpati, P. V. Satyam, B. N. Dev, and D. D. Sarma, “Synthesis and Characterization of Mn-Doped ZnO Nanocrystals,” J. Phys. Chem. B 108, 6303 (2004).
26.Srinivasa Rao Singamaneni, Wu Fan, J. T. Prater, and J. Narayan, “Magnetic properties of BaTiO3/La0.7Sr0.3MnO3 thin films integrated on Si(100),” J. Appl. Phys. 116, 224104 (2014).
28.E Orhan, J A Varela, A Zenatti, M F C Gurgel, F M Pontes, E R Leite, E Longo, P S Pizani, A Beltràn, and J Andrès, “Room-temperature photoluminescence of BaTiO3: Joint experimental and theoretical study,” Phys. Rev. B 71, 085113 (2005).
29.Shirou Otsuki, Keishi Nishio, Tohru Kineri, Yuiichi Watanabe, and Toshio Tsuchiya, “Optical Properties of Gold-Dispersed Barium Titanate Thin Films Prepared by Sol-Gel Processing,” J. Am. Ceram. Soc. 82(7), 1676-1680 (1999).
30.Xiaoquan Zhang, Xiaohui Wang, Zhibin Tian, Tieyu Sun, and Longtu Li, “Synthesis of Monodispersed Barium Titanate Nanoparticles with Narrow Size Distribution by a Modified Alkoxide-Hydroxide Sol-Precipitation Method,” J. Am. Ceram. Soc. 93(11), 3591-3594 (2010).
31.Z G Hu, G S Wang, Z M Huang, and J H Chu, “Structure-related infrared optical properties of BaTiO3 thin films grown on Pt/Ti/SiO2/Si substrate,” J. Phys. Chem. Solids 64(12), 2445-2450 (2003).
33.S Venugopal Rao, T Shuvan Prashant, T Sarma, K P Pradeepta, D Swain, and S P Tewari, “Two-photon and three-photon absorption in dinaphthoporphycenes,” Chem. Phys. Lett. 514, 98-103 (2011).
34.Syed Hamad, G Krishna Podagatlapalli, Surya P Tewari, and S Venugopal Rao, “Influence of picosecond multiple/single line ablation on copper nanoparticles fabricated for surface enhanced Raman spectroscopy and photonics applications,” J. Phys. D: Appl. Phys. 46, 485501 (2013).
35.M Yin, H P Li, S H Tang, and W Ji, “Determination of nonlinear absorption and refraction by single Z-scan method,” Appl. Phys. B. 70(4), 587-591 (2000).
36.K Venkata Saravanan, K C James Raju, M Ghanashyam Krishna, S P Tewari, and S Venugopal Rao, “Large three-photon absorption in Ba0.5Sr0.5TiO3 films studied using Z-scan technique,” Appl. Phys. Lett. 96, 232905 (2010).
37.Ming-Sheng Zhang, Jian Yu, Junhao Chu, Qiang Chen, and Wanchun Chen, “Microstructures and photoluminescence of barium titanate nanocrystals synthesized by the hydrothermal process’,” J. Mater. Proces. Tech. 137, 78-81 (2003).
38.M. F. C. Gurgel, J. W. M. Espinosa, A. B. Campos, I. L. V. Rosa, M. R. Joya, A. G. Souza, M. A. Zaghete, P. S. Pizani, E. R. Leite, J. A. Varela, and E. Longo, “Photoluminescence of crystalline and disordered BTO:Mn powder: Experimental and theoretical modelling,” Journal of Luminescence 126, 771–778 (2007).
39.Kui Woong Lee, Koppala Siva Kumar, Gaeun Heo, Maeng-Je Seong, and Jong-Won Yoon, “Characterization of hollow BaTiO3 nanofibers and intense visible Photoluminescence’,” J. Appl. Phys. 114, 134303 (2013).
43.G. Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari, S. Sreedhar, Muvva D. Prasad, and S. Venugopal Rao, “Silver nano-entities through ultrafast double ablation in aqueous media for surface enhanced Raman scattering and photonics applications,” J. Appl. Phys. 113, 073106 (2013).
44.R Le Harzic, D Dörr, D Sauer, F Stracke, and H Zimmermann, “Generation of high spatial frequency ripples on silicon under ultrashort laser pulses irradiation,” Appl. Phys. Lett. 98, 211905 (2011).
47.Soonil Lee, Gaiying Yang, Rudeger H. T. Wilke, Susan Trolier-McKinstry, and Clive A. Randall, “Thermopower in highly reduced n-type ferroelectric and related perovskite oxides and the role of heterogeneous nonstoichiometry,” Phys. Rev. B 79, 134110 (2009).
48.Soonil Lee, Jonathan A. Bock, Susan Trolier-McKinstry, and Clive A. Randall, “Ferroelectric-thermoelectricity and Mott transition of ferroelectric oxides with high electronic conductivity,” J. Eur. Ceram. Soc. 32(16), 3971-3988 (2012).
49.S Ramakanth and K C James Raju, “Band gap narrowing in BaTiO3 nanoparticles facilitated by multiple mechanisms,” J. Appl. Phys. 115, 173507 (2014).
50.B R Bennett, R A Soref, and J A D Alamo, “Carrier-induced change in refractive index of InP, GaAs and InGaAsP,” IEEE J. Quantum. Elect. 26, 113 (1990).
51.J G M Alvarez, F D Nunes, and N B Patel, “Refractive index dependence on free carriers for GaAs,” J. Appl. Phys. 51, 4365 (1980).
52.Weitian Wang, Liangsheng Qu, Guang Yang, and Zhenghao Chen, “Large third-order optical nonlinearity in BaTiO3 matrix-embedded metal nanoparticles,” Appl. Surf. Sci. 218, 24-28 (2003).
53.Litty Irimpan, A. Deepthy, Bindu Krishnan, L. M. Kukreja, V. P. N. Nampoori, and P. Radhakrishnan, “Effect of self assembly on the nonlinear optical characteristics of ZnO thin films,” Opt. Commun. 281(10), 2938-2943 (2008).
54.Chinmay Phadnis, Darshana Y. Inamdar, Igor Dubenko, Arjun Pathak, Naushad Ali, and Shailaja Mahamuni, “Ferromagnetic ZnO nanocrystals and Al-induced defects,” J. Appl. Phys. 110, 114316 (2011).
55.Tandra Ghoshal, Tuhin Maity, Ramsankar Senthamaraikannan, Matthew T. Shaw, Patrick Carolan, Justin D. Holmes, Saibal Roy, and Michael A. Morris, “Size and space controlled hexagonal arrays of superparamagnetic iron oxide nanodots: magnetic studies and application,” Sci. Reports 3, 2772 (2013).
56.Ying Zhang and S. Das Sarma, “Temperature and magnetization-dependent band-gap renormalization and optical many-body effects in diluted magnetic semiconductors,” Phys. Rev. B 72, 125303 (2005).
57.Wei Qin, Xiaoguang Li, Yi Xie, and Zhenyu Zhang, “Reentrant paramagnetism induced by drastic reduction of magnetic couplings at surfaces of superparamagnetic nanoparticles,” Phys. Rev. B 90, 224416 (2014).
Article metrics loading...
In our earlier studies the BaTiO3 samples were processed at higher temperatures like 1000oC and explained the observed magnetism in it. It is found that the charge transfer effects are playing crucial role in explaining the observed ferromagnetism in it. In the present work the samples were processed at lower temperatures like 650oC-800oC. The carrier densities in these particles were estimated to be ∼ 1019-1020/cm3 range. The band gap is in the range of 2.53eV to 3.2eV. It is observed that magnetization increased with band gap narrowing. The higher band gap narrowed particles exhibited increased magnetization with a higher carrier density of 1.23×1020/cm3 near to the Mott critical density. This hint the exchange interactions between the carriers play a dominant role in deciding the magnetic properties of these particles. The increase in charge carrier density in this undoped BaTiO3 is because of oxygen defects only. The oxygen vacancy will introduce electrons in the system and hence more charge carriers means more oxygen defects in the system and increases the exchange interactions between Ti3+, Ti4+, hence high magnetic moment. The coercivity is increased from 23 nm to 31 nm and then decreased again for higher particle size of 54 nm. These particles do not show photoluminescence property and hence it hints the absence of uniformly distributed distorted [TiO5]-[TiO6] clusters formation and charge transfer between them. Whereas these charge transfer effects are vital in explaining the observed magnetism in high temperature processed samples. Thus the variation of magnetic properties like magnetization, coercivity with band gap narrowing, particle size and charge carrier density reveals the super paramagnetic nature of BaTiO3
nanoparticles. The nonlinear optical coefficients extracted from Z-scan studies suggest that these are potential candidates for optical imaging and signal processing applications.
Full text loading...
Most read this month