Navigation Links
Mini disks for data storage
Date:3/14/2011

This release is available in German.

Tiny magnets organize themselves in vortices in the researchers' mini disks. The individual magnets can twist either in a clockwise or a counterclockwise direction in the disk. These two different states can be used in data processing just like switching the electricity "on" and "off" in conventional computers. In contrast to conventional memory storage systems, these magnetic vortices can be switched by the electrons' intrinsic spin and with far less power consumption.

In the exterior section of a vortex the magnetic particles align nearly parallel to one another while the space in the disk's center is insufficient for such a parallel arrangement. Therefore, the elementary magnets in the center of a vortex twist away from the surface of the disk in order to gain space and thus, orient themselves once again next to one another without consuming much energy.

The formation of a vortex only works smoothly if the individual magnetic disks maintain some distance to one another or are relatively big. In order to achieve a high data storage density for compact and efficient devices, manufacturers and users ask for the smallest possible data processing units, which in turn also feature small magnetic vortices and require a closely packed structure. Then, however, the tiny magnets in each disk "feel" their neighbors in the adjacent disks and start to interact. This interaction, though, is a poor prerequisite for memory storage systems.

Therefore doctoral candidate Norbert Martin and materials researcher Jeffrey McCord eliminated the cylindrical shape of the small magnetic disks and instead prepared them with slanted edges. The tiny magnets at the edges are thus forced in the direction of the slant. This orientation creates in turn a magnetic field perpendicular to the disk surface, which then is in the preferred direction of the slant. This requires a lot less energy than the symmetric orientation of this magnetic field for the disks with vertical outer edges. Accordingly, magnetic vortices form more easily with slanted edges.

To create these vortices, Norbert Martin places tiny glass spheres with a diameter of 0.30 thousandth of a millimeter (300 nanometers) on top of a thin magnetic layer. Under specific conditions, all of these glass spheres arrange next to each other and therefore form a mask of tiny hexagons with small gaps. When the scientists direct argon ions at this layer, these atomic and electrically charged projectiles penetrate the gaps between the glass spheres and force particles out of the magnetic layer located under the gaps. The array of the glass spheres, thus, functions as a mask: One magnetic disk remains below each individual glass sphere, while the magnetic layer under the gaps erodes. During the bombardment, though, the argon ions remove material from the glass spheres which, according to that, continuously decrease in size. At the end of the process the diameter of the glass spheres is only 260 nanometers, instead of the original 300 nanometers. This permits the argon ions to reach also areas which are located further inside the magnetic disks that are emerging beneath the glass spheres over time. Because the time of bombardment is shorter in these places, less material is removed on the inside. The desired slanted edge is therefore created virtually on its own.

The original article is published in Advanced Functional Materials, Volume 21, p. 891 (DOI: 10.1002/adfm.201002140). The results were compiled primarily at the Leibniz Institute for Solid State and Materials Research (IFW) Dresden where both scientists worked prior to joining the HZDR. Both institutes have been cooperating for many years in the field of magnetic research.


'/>"/>

Contact: Dr. Christine Bohnet
c.bohnet@hzdr.de
49-351-260-2450
Helmholtz Association of German Research Centres
Source:Eurekalert

Related biology technology :

1. New frozen smoke may improve robotic surgery, energy storage
2. AMDeCs Vendor Program Expands Focus with Addition of BioStorage Technologies, Offering Preferred Pricing on Tissue Storage and Cold Chain Logistics Services
3. BioStorage Technologies to Host Global Sample Management Benchmarking Symposium in Conjunction with Biorepositories Asia Conference
4. BioStorage Technologies Introduces New Version of Web-based Tracking and Sample Management System - ISISS®
5. Earthshaking possibilities may limit underground storage of carbon dioxide
6. Time ripe to move energy storage idea off drawing board
7. BioStorage Technologies Appoints New Vice President of Global Sales
8. Rethinking renewables: A new approach to energy storage for wind and solar
9. BioStorage Technologies Brings Together Industry Leaders for Global Sample Management Benchmarking Symposium
10. Magical BEANs: New nano-sized particles could provide mega-sized data storage
11. Scientists Give the Go-Ahead for Private Storage of Stem Cells From Umbilical Cord Blood
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/18/2017)... (PRWEB) , ... July 18, 2017 , ... ... today announced that Merck, a leading science and technology company, has implemented ... therapeutics for the therapeutic areas of Oncology, Immunology, and Neurodegenerative Diseases. , The ...
(Date:7/18/2017)... ... July 18, 2017 , ... Recently recognized by ... ) announces the migration of its flagship cloud-based product Planet Life Cycle – ... enterprise work management system that merges strategic and financial planning with execution. The ...
(Date:7/17/2017)... ... July 17, 2017 , ... OHAUS Corporation, a leading worldwide ... its new line of Heavy-Duty Orbital Shakers today. , Eight New Models Available, ... laboratory applications. These shakers are ideal for load capacities from 35 to ...
(Date:7/17/2017)... Iowa (PRWEB) , ... July 17, 2017 , ... ... component of its long-standing innovation strategy. A website (openinnovation.pioneer.com) dedicated to ... five strategic areas – trait discovery, plant breeding, enabling technologies, biologicals and digital ...
Breaking Biology Technology:
(Date:4/5/2017)... 2017  The Allen Institute for Cell Science today ... one-of-a-kind portal and dynamic digital window into the human ... first application of deep learning to create predictive models ... and a growing suite of powerful tools. The Allen ... future publicly available resources created and shared by the ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... anticipated to expand at a CAGR of 25.76% during ... diseases is the primary factor for the growth of ... report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global ... product, technology, application, and geography. The stem cell market ...
(Date:4/3/2017)... , April 3, 2017  Data captured ... engineering platform, detected a statistically significant association ... prior to treatment and objective response of ... potential to predict whether cancer patients will ... treatment, as well as to improve both pre-infusion ...
Breaking Biology News(10 mins):