Magnetic properties of TDAE-C 60 single crystal and powder samples: The influence of thermal annealing

• Published in: Solid state communications Vol. 101; no. 8; pp. 591 - 595
• Main Authors: Jagličić, Z., Trontelj, Z., Lužnik, J., Pirnat, J., Blinc, R.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-02-1997
• Subjects: A. ferroelectrics; A. fullerenes; D. phase transitions; D. phase transitions; A. fullerenes; A. ferroelectrics
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/S0038-1098(96)00654-0

Magnetization measurements in TDAE-C
60 single crystals reveal the importance of thermal annealing in these samples. Only propertly annealed single crystals and powder samples exhibit magnetism whereas freshly prepared single crystals show no magnetic signals. Extended measurements of
M(
H) and
M(
T) in TDAE-C
60 single crystals confirm the appearance of magnetic anisotropy below 16
K: the different shapes of
M(
H) signals for
H∥a axis and for
H∥c axis are in agreement with the previously introduced idea of canted spin orientation of unpaired electron spins on C
60
− ions in TDAE-C
60 crystals [1]. Correspondingly, the simultaneous presence of ferromagnetism along the
a axis and antiferromagnetism along the
c axis is possible.