First-order reversal curves (FORCs)
Acton, Gary Department of Geology, University of California, Davis, California.
- Links to Primary Literature
- Additional Readings
Magnetic properties can be used to determine the magnetic composition, grain size, concentration, and even the origin of a material or its magnetization, as is done in environmental and rock magnetic studies of natural materials, or to assess how synthetic materials can be exploited as media for magnetic recording or in other industries. Many of the fundamental bulk magnetic properties of a material, such as the saturation magnetization, saturation remanent magnetization, and coercivity (the field needed to demagnetize a sample), are obtained from magnetic hysteresis studies, which generally focus on the major hysteresis loop (Fig. 1). Bulk magnetic properties, however, only tell part of the story because magnetic materials are comprised of numerous microscopic magnetic domains, which are regions (for example, a submicrometer grain of magnetite) with uniform magnetization. These domains may interact with each other and often have variable magnetic properties even when the material is compositionally homogeneous. Hence rather than a single (bulk) coercivity, a material will have a distribution of coercivities and that distribution will be influenced by how each micromagnetic domain interacts with neighboring domains.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information