Karl A. Gschneidner and fellow scientists at the U.S. Department of Energy’s Ames Laboratory have created a new magnetic alloy that is an alternative to traditional rare-earth permanent magnets.
The new alloy—a potential replacement for high-performance permanent magnets found in automobile engines and wind turbines–eliminates the use of one of the scarcest and costliest rare earth elements, dysprosium, and instead uses cerium, the most abundant rare earth.
The result, an alloy of neodymium, iron and boron co-doped with cerium and cobalt, is a less expensive material with properties that are competitive with traditional sintered magnets containing dysprosium.
Experiments performed at Ames Laboratory by post-doctoral researcher Arjun Pathak, and Mahmud Khan (now at Miami University) demonstrated that the cerium-containing alloy’s intrinsic coercivity—the ability of a magnetic material to resist demagnetization—far exceeds that of dysprosium-containing magnets at high temperatures. The materials are at least 20 to 40 percent cheaper than the dysprosium-containing magnets.
“This is quite exciting result; we found that this material works better than anything out there at temperatures above 150° C,” said Gschneidner. “It’s an important consideration for high-temperature applications.”
Previous attempts to use cerium in rare-earth magnets failed because it reduces the Curie temperature—the temperature above which an alloy loses its permanent magnet properties. But the research team discovered that co-doping with cobalt allowed them to substitute cerium for dysprosium without losing desired magnetic properties.
Finding a comparable substitute material is key to reducing manufacturing reliance on dysprosium; the current demand for it far outpaces mining and recycling sources for it.
The University of Miami (informally referred to as UM, U Miami, Miami, or The U) is a private, non-sectarian university located in Coral Gables, Florida, United States, founded in 1925.
In addition to the university’s main campus in Coral Gables, the university maintains a medical school in Miami’s Civic Center and an oceanographic research facility on Virginia Key.
As of 2012, the university currently enrolls 15,613 students in 12 separate colleges, including a medical school, law school, and a school focused on the study of oceanography and atmospheric sciences. These colleges offer approximately 115 undergraduate, 114 master’s, 51 doctoral, and two professional areas of study. Over the years, the University’s students have represented all 50 states and close to 150 foreign countries. With more than 13,000 full and part-time faculty and staff, UM is the sixth largest employer in Miami-Dade County.
Research is a component of each academic division, with UM attracting $326 million per year in sponsored research grants. UM offers a large library system with over 3.1 million volumes and exceptional holdings in Cuban heritage and music. UM also offers a wide range of student activities, including fraternities and sororities, a student newspaper and radio station. UM’s intercollegiate athletic teams, collectively known as the Miami Hurricanes, compete in Division I of the National Collegiate Athletic Association, and its football team has won five national championships since 1983.
The Latest Updated Research News:
University of Miami research articles from Innovation Toronto
- Ames Laboratory scientists create cheaper magnetic material for cars, wind turbines – April 26, 2015
- Scientists develop a ‘nanosubmarine’ that delivers complementary molecules inside cells – July 5, 2014
- Chasing the black holes of the ocean
- Online citizen scientists: Classify plankton images
- Attention, Shoppers: Store Is Tracking Your Cell
- Robotic-Assisted Radical Bladder Surgery Potentially Benefits Bladder Cancer Patients
- Aerospace Engineer’s Supersonic, Futuristic Flying Wing Design Wins Prestigious NASA Grant
- Deep Thought Is Dead, Long Live Deep Thought
- Changing the Pace of Scientific Research
- New Way to Assess Risk from Chemicals
- An eBay for science
- No Elder Left Behind: Researchers Say Designers Can Help Close Tech Gap
- Spin Battery: Physicist Develops Battery Using New Source Of Energy