Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet

Slaven Garaj, Takashi Kambe, László Forró, Andrzej Sienkiewicz, Motoyasu Fujiwara, Kokichi Oshima

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

High-pressure electron spin resonance (ESR) measurements were performed on tetrakis(dimethylamino) ethylene (TDAE)-C60 single crystals and stability of the polymeric phase was established in the P-T parameter space, At 7 kbar the system undergoes a ferromagnetic to paramagnetic phase transition due to the pressure-induced polymerization. The polymeric phase remains stable after the pressure release. The depolymerization of the pressure-induced phase was observed at a temperature of 520 K, revealing an unexpectedly high thermal stability of the polymer. Below room temperature, the polymeric phase behaves as a simple Curie-type insulator with one unpaired electron spin per chemical formula. The TDAE+ donor-related unpaired electron spins, formerly ESR silent, become active above a temperature of 320 K, which demonstrates that the magnetic properties are profoundly defined by miniscule reorientation of TDAE molecules.

Original languageEnglish
Article number144430
Pages (from-to)1444301-1444307
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number14
Publication statusPublished - Oct 2003

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Polymers
Ethylene
ethylene
electron spin
electron paramagnetic resonance
polymers
Paramagnetic resonance
depolymerization
Depolymerization
retraining
Electrons
thermal stability
polymerization
insulators
Temperature
magnetic properties
Magnetic properties
Thermodynamic stability
temperature
Phase transitions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Garaj, S., Kambe, T., Forró, L., Sienkiewicz, A., Fujiwara, M., & Oshima, K. (2003). Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet. Physical Review B - Condensed Matter and Materials Physics, 68(14), 1444301-1444307. [144430].

Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet. / Garaj, Slaven; Kambe, Takashi; Forró, László; Sienkiewicz, Andrzej; Fujiwara, Motoyasu; Oshima, Kokichi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 14, 144430, 10.2003, p. 1444301-1444307.

Research output: Contribution to journalArticle

Garaj, S, Kambe, T, Forró, L, Sienkiewicz, A, Fujiwara, M & Oshima, K 2003, 'Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet', Physical Review B - Condensed Matter and Materials Physics, vol. 68, no. 14, 144430, pp. 1444301-1444307.
Garaj S, Kambe T, Forró L, Sienkiewicz A, Fujiwara M, Oshima K. Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet. Physical Review B - Condensed Matter and Materials Physics. 2003 Oct;68(14):1444301-1444307. 144430.
Garaj, Slaven ; Kambe, Takashi ; Forró, László ; Sienkiewicz, Andrzej ; Fujiwara, Motoyasu ; Oshima, Kokichi. / Polymer phase of the tetrakis(dimethylamino)ethylene-C60 organic ferromagnet. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 68, No. 14. pp. 1444301-1444307.
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