Photoinduced Magnetism
Abstract
Remarkable progress has been achieved in our investigations of photo induced magnetism (PIM) in several families of molecule-based magnets during the past three years. The advancements include development of utilization of a new experimental method in studies of PIM, report of the first system with coexisting photomagnetic and spin glass behavior, proposal of a new mechanism for photomagnetic effects in Prussian blue magnets, and, discovery of the first organic-based light-modulated magnet. Based on our elaborate magnetic and PIM studies of a series of Co-Fe Prussian blue analogs, we determined a highly unconventional type of magnetic ordering and proposed the first model for PIM effects that accounts for the observed cluster glass behavior. The experimental studies included the first use of ac susceptometry in investigation of PIM. This allowed the first direct observation of light induced changes in spin dynamics. Our discovery of PIM in an organic-based magnet, Mn(TCNE)2(.)x(CH2Cl2) resulted in dramatically higher PIM operating temperature (close to nitrogen boiling temperature of 77 K) than the one characteristic for Prussian blue magnets (^20 K). Photo induced optical studies revealed that PIM in this material is accompanied by changes in the electronic configuration as well as structural changes, entirely different than the Prussian blue magnets PIM mechanism.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 19, 2003
- Accession Number
- ADA419518
Entities
People
- Arthur J. Epstein
Organizations
- Ohio State University