Navigation Links
Spin pumping effect proven for the first time
Date:9/12/2011

Bochum's physicists led by Prof. Dr. Hartmut Zabel have demonstrated the spin pumping effect in magnetic layers for the first time experimentally. The behaviour of the spin pumping had previously only been predicted theoretically. The research team at the RUB has now succeeded in measuring the effect using ultrafast X-ray scattering with picosecond resolution. Through their rotation of the magnetic moments, the so-called magnetic precession, single electrons can mutually influence each other's rotation (spin) through a non-magnetic intermediate layer. This is a crucial insight for future generations of magnetic sensors in hard disk read heads and other data storage. The researchers reported on their findings in Applied Physics Letters.

Magnetic spinning tops are different

Once put into motion and left to itself, a spinning top will slow down after a few rotations and eventually come to a halt. Friction losses deprive it of energy, until it finally stops spinning. Also, two spinning tops put at a certain distance to avoid touching show by and large the same behaviour. "In particular, we do not expect that one spinning top can affect the rotation of the other", said Prof. Hartmut Zabel. Whether both tops rotate in the same or in the opposite direction, should have no impact on the number of rotations before they come to a stop. "But that's precisely what happens with magnetic spinning tops", as Bochum's research group confirmed in its experiments.

Magnetic rotation in the gigahertz range

Once triggered, the magnetic moments rotate in a crystal lattice until their rotation energy is exhausted through excitation of lattice vibrations and spin waves. Spin waves are excitations of the magnetic moments in a crystal, which propagate in form of waves. The research team separated two ultra-thin magnetic layers with a layer of copper. The copper layer was made thick enough that the two ferromagnetic layers can have n
'/>"/>

Contact: Professor Dr. Hartmut Zabel
hartmut.zabel@rub.de
49-234-322-3649
Ruhr-University Bochum
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Laboratory Pumping Systems to Reach $3.1 Billion by 2012, According to New Report by Global Industry Analysts, Inc.
2. China Biopharma Effects 1 for 100 Reverse Stock Split
3. Insmed and Premacure Cite Study Results Demonstrating Potential Effectiveness of IPLEX(TM) in Preventing Blindness in Premature Infants
4. Strong elasticity size effects in ZnO nanowires
5. New Data From Head-to-Head Phase 3 Trial Demonstrate That Liraglutide is More Effective Than Exenatide in Treatment of Type 2 Diabetes
6. Persistent Vaccination Effect of GRAZAX(R) After Completion of Treatment
7. DermTech and Rady Childrens Hospital-San Diego, Initiate Study to Understand Effects of Vitamin D as a Treatment for Atopic Dermatitis in Children and Young Adults
8. DURECTs Collaboration With Alpharma Clears HSR Review and Is Effective
9. VAP(R) Cholesterol Test Helps Researchers Identify Treatment Effects of Combination Therapy
10. Antheras Varespladib Demonstrates Significant Anti-Inflammatory Effect and LDL Reduction in Patients With Coronary Heart Disease
11. BioInformatics, LLC Studies Effective Strategies for Scientific Publishing in a Web 2.0 World
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/24/2014)... 2014 Continental Clinical Solutions, LLC ... clinical trials at its mid-Atlantic late-phase research facility, ... created with the idea of closing patient disparities ... in medical advances," said Continental's CEO, Saleh ... the immortal cell line of Henrietta Lacks, dubious ...
(Date:11/24/2014)... Md. , Nov. 24, 2014  Spherix ... development company committed to the fostering and monetization ... Spherix v. VTech Telecommunications Ltd.,  Case No. 3:13-cv-03494-M ... Case No. 3:13-cv-03496-M, both in the United States ... Texas . On ...
(Date:11/22/2014)... November 21, 2014 Two new educational webinars ... comes next for ALS research and how the pharmaceutical industry ... the Ice Bucket Challenge: Where Does the ALS Money Go? ... 2 December 2014, Time: 1:30pm ET, Register to ... speaker Dr. Merit Cudkowicz, Julianne Dorn Professor of Neurology at ...
(Date:11/22/2014)... 21, 2014 CannLabs, Inc. ... analytics and scientific testing methodologies relating to cannabis, today ... $750,000 line of credit from an existing stockholder of ... have secured this commitment from one of our existing ... CannLabs. “This capital will help accelerate our planned expansions ...
Breaking Biology Technology:At Continental Clinical Solutions, CEO Saleh Stevens Focuses on Diversity in Clinical Trial Recruitment at Maryland Site 2At Continental Clinical Solutions, CEO Saleh Stevens Focuses on Diversity in Clinical Trial Recruitment at Maryland Site 3Markman Hearing Held as Scheduled in VTech and Uniden Cases 2DrugDev Webinars in December to Explore What Comes Next for ALS Research and How We Can Make Life Easier for Clinical Sites 2CannLabs Secures $750,000 Line Of Credit 2
... (GFP) in their retina cells or other tissues can ... real time computer record of movement and gene expression. ... BMC Biotechnology , will allow detailed analyses of ... Tower led a team of researchers from the University ...
... Washington Life Sciences Discovery,Fund (LSDF) has awarded nearly $4.7 ... Alliance (WAVA) and to support initial research into,three new ... the,grant is funded by Washington,s$350 million tobacco-lawsuit-settlement bonus,and provides ... , WAVA core ...
... Office has,issued Nutraceutix, Inc. a patent for BIO-tract. It ... the technology has been awarded based,on BIO-tract,s ability to ... their way to optimal release sites in the,intestinal tract. ... Nutraceutix comments: "Many years ago,we recognized the need for ...
Cached Biology Technology:Life Sciences Discovery Fund Awards $4.7 Million to Support New Vaccine Program 2Life Sciences Discovery Fund Awards $4.7 Million to Support New Vaccine Program 3Life Sciences Discovery Fund Awards $4.7 Million to Support New Vaccine Program 4Probiotic Delivery Technology Awarded Third International Patent 2
(Date:11/18/2014)... -- The Parenteral Drug Association (PDA) today confirmed that seven ... at least seven more will participate in the upcoming 2014 ... in Washington D.C. , Dec. 2-4. ... from the regulatory agencies in the United States ... effort to help advance the use of metrics in the ...
(Date:11/12/2014)... PALM BEACH GARDENS, Fla. , Nov. 12, 2014 ... management solutions, announced today that its U.are.U ® ... upscale retail bakery chain in Central Mexico ... solution in June 2014 to eliminate payroll issues caused ... Prior to installing the U.are.U fingerprint readers, Montparnasse ...
(Date:11/7/2014)... Dr. Debra Auguste, associate professor, biomedical engineering, in ... College of New York, have identified a molecule ... of the most aggressive forms of breast cancer. ... high mortality rate owing to aggressive proliferation and ... However, Professor Auguste,s team, discovered the overexpression of ...
Breaking Biology News(10 mins):FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2
... NEW YORK , Aug. 16, 2013   EyeLock Inc. , a ... of Roger An as Vice President of Global ... for research, analysis and strategic initiatives to further the embedded ... a heavy focus on Asia .   ...
... 2013) Primary results from a new clinical ... treated with the monoclonal antibody teplizumab (MacroGenics, Inc.) ... islet cell function, compared to controls. Further analyses ... that demonstrated especially robust responses ("responders"), suggesting that ...
... body is a complicated system of blood vessels, nerves, organs, ... When all are working together, it,s a symphony of form ... Biologist Rejji Kuruvilla and her fellow researchers uncovered what happens ... along with graduate students Philip Borden and Jessica Houtz, both ...
Cached Biology News:EyeLock Appoints Roger An Vice President of Global Market Development 2EyeLock Appoints Roger An Vice President of Global Market Development 3ITN type 1 diabetes study identifies subset of patients with strong response to therapy 2ITN type 1 diabetes study identifies subset of patients with strong response to therapy 3Sympathetic neurons 'cross talk' with pancreas cells during early development 2Sympathetic neurons 'cross talk' with pancreas cells during early development 3