Navigation Links
Domain walls that conduct electricity
Date:1/29/2009

ferrite films. (A thin layer of a different compound, strontium ruthenium oxide (SrRuO3), was first laid down between the substrate and the bismuth ferrite to serve as an electrode.)

Like many other multiferroic oxides, bismuth ferrite has the crystal structure of perovskite, in which planes of oxygen atoms and heavy atoms (like bismuth) alternate with planes of oxygen atoms and lighter atoms (like iron). An iron atom is at the center of the basic bismuth ferrite cubic cell, and its position whether slightly off center in one direction or another plus the positions of affected bismuth atoms, gives rise to local polarization.

The bismuth ferrite films contained ferroelectric domains between 5 and 10 micrometers (millionths of a meter) in dimension, and, says Seidel, "we can map and even change the domain structure by using different scanning-probe mechanisms."

Bismuth ferrite is an insulator, but each domain has a distinct polarization or orientation of charge, which Seidel mapped using a piezoresponse force microscope (PFM): as the PFM probe moves across a sample, an alternating electric field in the tip gives rise to a detectable mechanical response in the sample, according to its polarization. The same PFM setup can control the nature of the local polarization of the film by applying a large enough voltage to switch it.

To map out the topographic features of the film surface, the scanning probe was used in atomic force microscopy (AFM) mode. In AFM the probe effectively "feels" its way across the surface, like a stylus in a record player feeling the grooves in a record. Moreover, by setting a voltage that is too slight to affect the polarization of the domains, the researchers can probe the electronic properties of the films.

In this mode (conducting AFM), Seidel measured the local conductivity of the sample across the domains and across domain walls. The domains were indeed nonconducting since bismuth ferrite i
'/>"/>

Contact: Paul Preuss
paul_preuss@lbl.gov
510-486-6249
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology technology :

1. Time Domain Showcases Precision Location Capability of Ultra Wideband PLUS Product Line at HIMSS 2008
2. NorthPoint Domain and NYU Vascular Associates Partner to Develop New Generation of Care Delivery Informatics Instruments
3. NorthPoint Domain and Boston Medical Center Partner to Apply Advanced Patient Engagement Instruments to Pioneering Cardiac Robotic Surgery Program
4. WallSt.net (www.wallst.net) Announces Upcoming Interview With CEO of Osteologix
5. WallSt.net (www.wallst.net) Announces Upcoming Interview With CEO of DNAPrint Genomics
6. WallSt.net Announces Upcoming Interview with CEO of BioSante Pharmaceuticals
7. WallSt.net Announces Upcoming Interview With CEO of Biomoda
8. Synvista Therapeutics to be Featured on Wallst.net
9. WallSt.net Announces Upcoming Interview With CEO Of Immunosyn Corporation
10. AMDL Presentation of China Success Story from Rodman & Renshaw Annual Healthcare Conference Available at WallStreetReporter.com
11. WallSt.net Announces Upcoming Interview With CEO of ReBuilder Medical Technologies
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Domain walls that conduct electricity
(Date:8/27/2015)... ... August 27, 2015 , ... Inc. Magazine released its annual ... Solutions as number 1,361 in growth for the three years through 2014. Being named ... fastest-growing privately held organizations in the country. , “We are thrilled to make ...
(Date:8/27/2015)... 27, 2015 In response to recent ... and The US Postal Service to no longer ... ,select agents, by the CDC, Marken reaffirmed today ... sensitive shipments. Marken uses its flexible ... and certified personnel to ensure the safe and ...
(Date:8/26/2015)... ... August 26, 2015 , ... MediVet Biologics, a leader ... laboratory is to open in Manhattan, Kansas in early October, 2015. The location ... of research and development through collaboration with researchers from Kansas State University’s College ...
(Date:8/26/2015)... 26, 2015  Roka Bioscience, Inc. (NASDAQ: ROKA ... testing solutions for the detection of foodborne pathogens, today ... the Sidoti & Company Emerging Growth Conference on September ... at the New York Marriott Marquis. ... through the investor relations section of Roka Bioscience,s website ...
Breaking Biology Technology:iLab Solutions Named to 2015 Inc. 5000 List 2iLab Solutions Named to 2015 Inc. 5000 List 3Marken Ensures Safe Transportation Of Select Agents And Toxins 2MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 2MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 3
... from televisions to computers, depend on conducting materials that can ... communications devices and microchips that can fit on the head ... Now, Prof. Eran Rabani of Tel Aviv University,s School ... Exact Sciences, in collaboration with Profs. Uri Banin and Oded ...
... 15, 2011 The current issue of Popular Science ... of the Genesis Biopharma, Inc. (OTC/BB: GNBP) Board of Directors, and ... The entire 11-page story, titled "The Man Who ... www.popsci.com About Genesis Biopharma, Inc. ...
... measuring the immune response to the H1N1 flu virus, could ... who have already been infected with the flu virus. ... IOP Publishing,s Journal of Breath Research , researchers have ... accumulate in response to the H1N1 strain. Research ...
Cached Biology Technology:Conducting energy on a nano scale 2Conducting energy on a nano scale 3'Swine flu' breath test could reduce future vaccination shortages, research suggests 2
(Date:8/12/2015)... 12, 2015   MedNet Solutions , an innovative ... of clinical research, is proud to announce that ... SaaS-based eClinical technology platform, has led the way to ... quarters of 2015.   Q2 2015 and Q1 2015 ... by contract value sold in the company,s 15 year ...
(Date:8/12/2015)... JOSE, Calif. , Aug. 12, 2015 /PRNewswire/ ... developer of human interface solutions, today announced that ... recently announced Match-in-Sensor solution, have officially been named ... Alliance. As part of the certification, Synaptics, Natural ... FIDO 1.0 Universal Authentication Framework (UAF) standard and ...
(Date:8/10/2015)... 10, 2015 The latest 364 page ... analysis of the global border security market . ... $16.4bn in 2015. Now: Border security is hard ... of the business critical issue you need to know about ... ,s objective analysis of how this will impact your company ...
Breaking Biology News(10 mins):MedNet Solutions Experiences Explosive Corporate Growth 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
... study to assess the social impact of food allergies ... 35 percent of children with food allergies, who are ... experienced bullying, teasing, or harassment as a result of ... or harassment, 86 percent were reported to have experienced ...
... Long before geese started flying in chevron formation or cyclists ... to reduce drag on their spores so as to spread ... fungus, the destructive Sclerotinia sclerotiorum , spews thousands of ... to nearly zero and even creates a wind that carries ...
... Rice University physicist Dmitri Lapotko has demonstrated that plasmonic ... can detect and destroy cancer cells in vivo by ... and selectively explode them. A paper in the ... details the effect of plasmonic nanobubble theranostics on zebra ...
Cached Biology News:First study of its kind finds children with food allergies are often victims of bullying 2Fungal spores travel farther by surfing their own wind 2Fungal spores travel farther by surfing their own wind 3Fungal spores travel farther by surfing their own wind 4'Gold' fish thrive, cancers die 2'Gold' fish thrive, cancers die 3
With L-glutamine and potassium bicarbonate. Sterile, Insect cell culture tested...
Mol wt: average mol wt12,360.96 Da by calculation...
Originally developed for the culture of Drosophila; suitable for culture of other dipteran cell lines. Powder, Insect cell culture tested...
... Adaptor encodes a T7 promoter, lac ... translation initation codon and an N-terminal GST•Tag ... reported to enhance the production and in ... partners. The GST•Tag is a multi-purpose tag ...
Biology Products: