Low dimensionality observed by ESR measurements in S = 1 spin ladder substance BIP-TENO (3,3', 5,5'-tetrakis(N-tert-butylaminoxyl)biphenyl)

• Published in: Journal of the Physical Society of Japan 2002-11, Vol.71 (11), p.2640-2643
• Main Authors: OHTA, Hitoshi, KIRITA, Keizo, KUNIMOTO, Takashi, OKUBO, Susumu, HOSOKOSHI, Yuko, KATOH, Keiichi, INOUE, Katsuya, OGASAHARA, Akira, MIYASHITA, Seiji
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron paramagnetic resonance and relaxation; Exact sciences and technology; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Physics
• ISSN: 0031-9015; 1347-4073
• DOI: 10.1143/JPSJ.71.2640

X-band ESR measurements of BIP-TENO (3,3',5,5'-tetrakis(N-tert-butylaminoxyl)biphenyl) single crystal, which is an S=1 spin ladder model substance, have been performed in the temperature region from 3.5 to 300 K. At room temperature, the angular dependences of g-value and line width were observed. The line shape and the angular dependence of the line width showed typical behavior of a low-dimensional antiferromagnet. The temperature dependence measurements showed the minimum of the line width and the dynamical g-shift, which were also typical behaviors of a low-dimensional antiferromagnet. However, the direction of the dynamical g-shift does not coincide with Nagata's well-known theory, and the comparison with the recent direct ESR calculation by Miyashita et al. [S. Miyashita, T. Yoshino and A. Ogasahara: J. Phys. Soc. Jpn. 68 (1999) 655] is discussed.