Multiple Photonic Responses in Films of Organic-Based Magnetic Semiconductor V(TCNE)x, x∼2
Abstract
Concomitant photoinduced magnetic and electrical phenomena are reported for the organic-based magnetic semiconductor V(TCNE)x (x∼2; TCNE=tetracyanoethylene; magnetic ordering temperature Tc∼400K). Upon optical excitation (457.9 nm), the system can be trapped in a thermally reversible photoexcited state, which exhibits reduced magnetic susceptibility and increased conductivity with a simultaneous change in IR absorption spectrum. The multiple photonic effects in V(TCNE)x are proposed to originate from structural changes induced by internal excitation in (TCNE)- anions, which lead to relaxation to a long-lived metastable state.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2006
- DOI:
- 10.1103/PhysRevLett.97.247205
- Bibcode:
- 2006PhRvL..97x7205Y
- Keywords:
-
- 75.50.Xx;
- 75.50.Lk;
- 75.90.+w;
- 78.90.+t;
- Molecular magnets;
- Spin glasses and other random magnets;
- Other topics in magnetic properties and materials;
- Other topics in optical properties condensed matter spectroscopy and other interactions of particles and radiation with condensed matter