Details

Autor(en) / Beteiligte

• HUANG, Z. J
• FENG CHEN
• REN, Y. T
• XUE, Y. Y
• CHU, C. W
• MILLER, J. S

Titel

Pressure dependence of magnetic ordering temperature for decamethylferrocenium tetracyanoethanide

Ist Teil von

• Journal of applied physics, 1993-05, Vol.73 (10), p.6563-6565

Ort / Verlag

Woodbury, NY: American Institute of Physics

Erscheinungsjahr

1993

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• It has been demonstrated that the linear-chain charge-transfer salt, decamethylferrocenium tetracyanoethanide (DMeFc)(TCNE), is a ferromagnet with a transition temperature of ∼4.8 K. This low-temperature 3D ordering has been attributed to a strong intrachain and a weak interchain interaction. To study these interactions, we have determined the Tc up to 20 kbar by measuring the ac susceptibility χ at low frequency. Our results show that the Tc increases with pressure at a rate of ∼0.22 K/kbar, while the χ peak indicative of the ferromagnetic transition continues to decrease rapidly. A small peak was also detected above the main transition at pressures above 3 kbar. This new peak persists even after the pressure is removed. The result from dc magnetization suggests that this corresponds to a metamagnetic state. For the first time, we have observed pressure-induced phase-transition in this material.