Pressure dependence of the exchange anisotropy in an organic ferromagnet
Abstract
The combination of high-pressure ferromagnetic resonance (FMR) and an ab-initio scheme suitable for calculation of spin-orbit mediated anisotropic exchange interactions in molecular materials provides insights into the role of spin-orbit coupling (SOC) in a Se-based organic ferromagnet. FMR measurements reveal a continuous increase in the magnetic anisotropy with increasing pressure (up to 2.2 GPa), in excellent agreement with calculations based on the known pressure dependence of the structure. The large value of anisotropic exchange terms in this heavy atom organic ferromagnet emphasizes the important role of SOC in a wide range of organics where this effect is usually considered to be small.
- Publication:
-
Physical Review B
- Pub Date:
- January 2015
- DOI:
- 10.1103/PhysRevB.91.014412
- Bibcode:
- 2015PhRvB..91a4412T
- Keywords:
-
- 75.30.Et;
- 71.30.+h;
- 75.50.Xx;
- 76.50.+g;
- Exchange and superexchange interactions;
- Metal-insulator transitions and other electronic transitions;
- Molecular magnets;
- Ferromagnetic antiferromagnetic and ferrimagnetic resonances;
- spin-wave resonance