Results 21 to 30 of about 314,270 (307)

Proper Ferroelectricity in the Dion?Jacobson Material CsBi2Ti2NbO10: Experiment and Theory [PDF]

, 2015
A diverse range of materials and properties are exhibited by layered perovskites. We report on the synthesis, characterization, and computational investigation of a new ferroelectric?CsBi2Ti2NbO10, an n = 3 member of the Dion?Jacobson (DJ) family ...
Hyatt NC, Deacon CA, Tran, T. Thao, McCabe, Emma E., Hyatt, Neil C., Bousquet, Eric, Bousquet E, Stennett, M. C., Tran TT, Stockdale CPJ, McCabe EE, Tran, T. T., Stockdale, Christopher P. J., Halasyamani PS, Stockdale, C. P. J., Halasyamani, P. Shiv, McCabe, E. E., Deacon, Charles A., Stennett MC, Stockdale, Christopher P.J., Stennett, Martin C., Halasyamani, P. S., Hyatt, N. C., Deacon, C. A.   +23 more
core   +1 more source

Understanding and enhancing polarization in complex materials [PDF]

Computing in Science & Engineering, 2004
Recent advances in theoretical methods and high-performance computing allow for reliable first-principles investigations of complex materials. This article focuses on calculating and predicting the properties of piezoelectrics and "designing" new materials with enhanced piezoelectric responses. This paper considers two systems: boron-nitride nanotubes (
Jerry Bernholc, Serge M. Nakhmanson, Marco Buongiorno Nardelli, Vincent Meunier   +3 more
openaire   +1 more source

Infrared emission bands and thermal effects for 440-nm-emitting GaN-based laser diodes

AIP Advances, 2020
Broad emission bands due to defects in (In,Ga,Al)N laser diodes operating at 440 nm are investigated using continuous-wave and pulsed currents. In addition to known yellow–green and short-wave infrared bands, defect emissions were observed even in the ...
Feng Mao, Jin Hong, Han Wang, Ye Chen, Chengbin Jing, Pingxiong Yang, Jens W. Tomm, Junhao Chu, Fangyu Yue   +8 more
doaj   +1 more source

Dirac fermion metagratings in graphene

npj 2D Materials and Applications, 2021
We theoretically demonstrate a Dirac fermion metagrating which is an artificially engineered material in graphene. Although its physics mechanism is different from that of optical metagrating, both of them can deliver waves to one desired diffraction ...
Pengcheng Wan, Yinghui Ren, Qianjing Wang, Di Huang, Ling Zhou, Haiqin Guo, Junjie Du   +6 more
doaj   +1 more source

Dielectric Relaxation Behavior of BTO/LSMO Heterojunction

Nanomaterials, 2021
The BaTiO3 (BTO)/La0.7Sr0.3MnO3 (LSMO) magnetoelectric composite films were prepared by sol-gel method on STO (001) substrates. The heterojunction has highly preferred orientation and exhibits well ferroelectric properties with perfect hysteresis loops ...
Guoqiang Song, Yuanyuan Zhang, Sheng Li, Jing Yang, Wei Bai, Xiaodong Tang   +5 more
doaj   +1 more source

Characterization of materials for a vacuum-ultraviolet polarization analyzer [PDF]

Applied Optics, 2003
Astronomical measurements in the vacuum-UV spectral region (30-190 nm) require space instruments and techniques that are at the boundary between visible and x-ray techniques. In vacuum-UV polarimetry, transmission polarizers must be replaced by reflection polarizers because of the lack of transparent materials in the 30-105-nm range.
Gianni Corti, ROMOLI, MARCO
openaire   +2 more sources

BOOK REVIEW: The 1926/27 Soviet polar census expeditions

, 2012
After the Russian Civil War, in 1925, the new Soviet leaders cast their eyes on the thinly populated and remote northern areas of the Russian Empire to make them active parts of the Soviet project.
Dallmann, Winfried K., Winfried K. Dallmann   +1 more
core   +1 more source

Evaluation of Health Indicators and the Quality of Used Frying Oils in Fast Food Restaurants of Mashhad in 2018

Journal of Environmental Health and Sustainable Development, 2020
Introduction: Recently, changes in people's lifestyles and new eating habits have diminished the importance of main dishes and have led to increasing the consumption of fast foods.
Zohreh Rahnama Bargard, Hossien Alidadi, Monavvar Afzal Aghaee, Mahnaz Kharghani, Mahsa Mahjoubizadeh, Fatemeh Kariminejad   +5 more
doaj  

Gossamer roadmap technology reference study for a solar polar mission

, 2013
A technology reference study for a solar polar mission is presented. The study uses novel analytical methods to quantify the mission design space including the required sail performance to achieve a given solar polar observation angle within a given ...
Finsterle, W, Seboldt W., Ruedeger Reinhard, W. Seboldt, G. Mengali, Solanki, S. K., Finsterle W., Appourchaux, T., McGrath C., Dachwald, Bernd (Prof. Dr.-Ing.), McGrath, C., C. R. McInnes, McInnes, C.R., McInnes C. R., M. Macdonald, T. Appourchaux, McInnes C., Seboldt, Wolfgang, Sekii T., McInnes, Colin, C. McGrath, Reinhard R., Wimmer Schweingruber R., Wimmer-Schweingruber, R. F., Sekii, T., Velli, M., Liewer, P.C., L. Gizon, Appourchaux, T, Velli, M, P. C. Liewer, Seboldt, W., Wimmer-Schweingruber, R.F., Wimmer Schweingruber R. F., W. Finsterle, McGrath, Ciara, Gizon, L, Macdonald, M., McInnes, Colin R., Solanki S., Velli M., Sekii, T, S. K. Solanki, Peter Spietz, M. Velli, Liewer, P. C., T. Sekii, Gizon L., Liewer P., B. Dachwald, Finsterle, W., Appourchaux T., Mengali, Giovanni, Mengali, G., Liewer P. C., Dachwald B., Spietz, Peter, Spietz P., McGrath, Ciara; id_orcid, Solanki, S.K., Dachwald, B., R. F. Wimmer-Schweingruber, Macdonald, Malcolm, Macdonald M., Reinhard, Ruedeger, Gizon, L.   +65 more
core   +1 more source

Evolution of cation ordering and crystal defects controlled by Zn substitutions in Cu2SnS3 ceramics

AIP Advances, 2018
The microstructures of a series of Cu2ZnxSn1-xS3 (x = 0, 0.05, 0.10, 0.15,0.20) ceramic samples are investigated by a combination of selected area electron diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), high-angle annular ...
Chao Li, Haili Song, Yawei Shen, Yifeng Wang, Yan Cheng, Ruijuan Qi, Shiyou Chen, Chungang Duan, Rong Huang   +8 more
doaj   +1 more source