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Effects of a magnetic field on triplet-triplet annihilation in a Pt-phthalocyanine single crystal at 4.2 K
Authors:K. Kaneto   K. Yoshino  Y. Inuishi
Affiliation:

Department of electrical Engineering, Faculty of Engineering, Osaka University, Yamada-Kami, Suita, Osaka, Japan

Abstract:
Mutual annihilation of triplet excitons in Pt-phthalocyanine single crystal at 4.2 K has been studied under magnetic fields of up to 100 kG through the measurement of the phosphorescence decay by Q-switched ruby laser excitation. The maximum annihilation rate γ which is larger than that of zero magnetic field by 40–50% is obtained at magnetic fields of 30–40 kG. The annihilation rate γ is of the order of 10−12 cm3/s.
Keywords:
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