نتایج جستجو برای: ferroelectric thin films

تعداد نتایج: 187524  

2010
Nina V. Burbure Paul A. Salvador Gregory S. Rohrer

Titania films were grown on BaTiO3 (BTO) substrates by pulsed laser deposition to create (001)Anatase||(100)BTO, (100)Rutile||(111)BTO, and (110)Rutile||(110)BTO heterostructures. The photochemical reactivity was evaluated by observing the amount of silver reduced by each film under identical conditions. The thickest films (100 nm) had reactivities that varied with the phase of titania and the ...

2016
D. B. Gopman C. L. Dennis P. J. Chen Y. L. Iunin P. Finkel M. Staruch R. D. Shull

Multifunctional materials composed of ultrathin magnetic films with perpendicular magnetic anisotropy combined with ferroelectric substrates represent a new approach toward low power, fast, high density spintronics. Here we demonstrate Co/Ni multilayered films with tunable saturation magnetization and perpendicular anisotropy grown directly on ferroelectric PZT [Pb(Zr0.52Ti0.48)O3] substrate pl...

2017
Yu-Meng You Yuan-Yuan Tang Peng-Fei Li Han-Yue Zhang Wan-Ying Zhang Yi Zhang Heng-Yun Ye Takayoshi Nakamura Ren-Gen Xiong

Ferroelectric thin-films are highly desirable for their applications on energy conversion, data storage and so on. Molecular ferroelectrics had been expected to be a better candidate compared to conventional ferroelectric ceramics, due to its simple and low-cost film-processability. However, most molecular ferroelectrics are mono-polar-axial, and the polar axes of the entire thin-film must be w...

2013
Xiaohua Liu Shuangyi Liu Myung-Geun Han Lukas Zhao Haiming Deng Jackie Li Yimei Zhu Lia Krusin-Elbaum Stephen O’Brien

Transition metal ferrites such as CoFe2O4, possessing a large magnetostriction coefficient and high Curie temperature (Tc > 600 K), are excellent candidates for creating magnetic order at the nanoscale and provide a pathway to the fabrication of uniform particle-matrix films with optimized potential for magnetoelectric coupling. Here, a series of 0-3 type nanocomposite thin films composed of fe...

Journal: :Physical review letters 2010
H W Jang A Kumar S Denev M D Biegalski P Maksymovych C W Bark C T Nelson C M Folkman S H Baek N Balke C M Brooks D A Tenne D G Schlom L Q Chen X Q Pan S V Kalinin V Gopalan C B Eom

Biaxial strain is known to induce ferroelectricity in thin films of nominally nonferroelectric materials such as SrTiO3. By a direct comparison of the strained and strain-free SrTiO3 films using dielectric, ferroelectric, Raman, nonlinear optical and nanoscale piezoelectric property measurements, we conclude that all SrTiO3 films and bulk crystals are relaxor ferroelectrics, and the role of str...

2016
A. Saeidi Adrian M. Ionescu

Keywords: HfO 2 Analytical model Surface potential Ferroelectric Nonvolatile memory Fe-TFET a b s t r a c t The implementation and operation of the nonvolatile ferroelectric memory (NVM) tunnel field effect transistors with silicon-doped HfO 2 is proposed and theoretically examined for the first time, showing that ferroelectric nonvolatile tunnel field effect transistor (Fe-TFET) can operate as...

2014
Yoshiaki Shinohara Aki Hosoya Hajime Hirase

Engineering domains in ferroelectric thin films is crucial for realizing technological applications including non-volatile data storage and solar energy harvesting. Size and shape of domains strongly depend on the electrical and mechanical boundary conditions. Here we report the origin of nonswitchable polarization under external bias that leads to energetically unfavourable head-to-head domain...

2001
Alexei Gruverman Orlando Auciello Hiroshi Tokumoto

Scanning force microscopy (SFM) is becoming a powerful technique with great potential both for imaging and for control of domain structures in ferroelectric materials at the nanometer scale. Application of SFM to visualization of domain structures in ferroelectric thin films is described. Imaging methods of ferroelectric domains are based on the detection of surface charges in the noncontact mo...

2009
N. Yamauchi T. Shirai T. Yoshihara Y. Hayasaki T. Ueda T. Matsushima K. Wasa I. Kanno H. Kotera

We have deposited nearly stress-free single-crystal thin films of 001 Pb Mn,Nb O3–Pb Zr,Ti O3 PMnN-PZT on 001 MgO substrates by rf-magnetron sputtering using a quenching process after the film growth. It is found that single c-domain/single-crystal thin films of PMnN-PZT containing 5%–10% PMnN show a strong hard ferroelectric response with 2Ec 400 kV /cm and Ps 70 C /cm2. GHz-range film bulk ac...

Journal: :IEEE transactions on ultrasonics, ferroelectrics, and frequency control 2009
Sharath Sriram Madhu Bhaskaran Tatiana S Perova Vasily A Melnikov Anthony S Holland

Thin films of ferroelectric strontium-doped lead zirconate titanate [PSZT, (Pb(0.92)Sr(0.08))(Zr(0.65)Ti(0.35))O(3)] deposited by RF magnetron sputtering have been analyzed by in situ analysis techniques. The in situ techniques employed for this study include micro-Raman spectroscopy and X-ray diffraction (XRD), and variations in thin film structure and orientations for temperatures up to 350 d...

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