Iron-platinum alloys could be new-generation hard drives
Meeting the demand for more data storage in smaller volumes means using materials made up of ever-smaller magnets, or nanomagnets. One promising material for a potential new generation of recording media is an alloy of iron and platinum with an ordered crystal structure. Researchers led by Professor Kai Liu and graduate student Dustin Gilbert at the University of California, Davis, have now found a convenient way to make these alloys and tailor their properties. "The relatively convenient synthesis conditions, along with the tunable magnetic properties, make these materials highly desirable for future magnetic recording technologies," said Liu, a professor of physics. The iron-platinum alloy has the ability to retain information even at extremely small nanomagnet sizes, and it is resistant to heat effects.
Previous methods for making the iron-platinum alloys with an ordered crystal structure involved high-temperature treatments that would be difficult to integrate into the rest of the manufacturing process, Liu said.
The researchers, including Liang-Wei Wang and Chih-Huang Lai of the National Tsing Hua University, Taiwan, and Timothy Klemmer and Jan-Ulrich Thiele, of Seagate Technologies in Fremont, used a method called atomic-scale multilayer sputtering to create a material with extremely thin layers of metal, and rapid thermal annealing to convert it into the desirable ordered alloy. They were able to adjust the magnetic properties of the alloy by adding small amounts of copper into particular regions of the alloy.
A paper describing the work was recently published in the journal Applied Physics Letters and featured in its Research Highlights. The work was supported by the National Science Foundation Materials World Network Program.
Source: University of California - Davis
- Iron-platinum alloys could be new-generation hard drivesfrom Science DailyMon, 20 May 2013, 19:00:27 EDT
- Iron-platinum alloys could be new-generation hard drivesfrom PhysorgMon, 20 May 2013, 16:31:02 EDT
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- Dark matter even darker than once thought
- UT Dallas engineers twist nanofibers to create structures tougher than bulletproof vests
- The Mediterranean diet is not only healthier, it also pollutes less
- Antarctic ice shelves rapidly thinning
- 30 new species discovered in Los Angeles in first-ever intensive urban biodiversity survey
- New processing technology converts packing peanuts to battery components
- International study raises questions about cause of global ice ages
- Researchers develop detailed genetic map of world wheat varieties
- Adapting to climate change will bring new environmental problems
- Squid enrich their DNA 'blueprint' through prolific RNA editing