Nonresonant Microwave Absorption in Bi2212 Single Crystal: Second Peak and Microwave Power Dependence |
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Authors: | V. V. Srinivasu Ken-ichi Itoh Akinori Hashizume V. Sreedevi Hideaki Kohmoto Tamio Endo R. Ricardo da Silva Yakov Kopelevich Sergio Moehlecke Takami Masui Kazuya Hayashi |
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Affiliation: | (1) Faculty of Engineering, Mie University, Tsu, Mie, 514-8507, Japan;(2) Instituto de Fisica, Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, Sao Paulo, Brazil;(3) Mie Prefectural Industrial Research Institute, Takachaya, Tsu, Mie, 514-0819, Japan |
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Abstract: | Nonresonant microwave absorption (NMA) measurements were carried out at liquid-nitrogen temperature on a high quality Bi2212 single crystal, as a function of microwave power in three mutual orientations of crystal ab plane, dc field (Hdc), and microwave magnetic field (Hw). NMA line shapes in Bi2212 crystal are complicated with a narrow peak (P1 peak) located near zero field, followed by a much broader second peak (P2 peak) in the particular orientations. More excitingly, we show that the P2 peak qualitatively evolves as a function of microwave power in the orientation of Hdc ab plane, plane, and Hdc Hw. In this configuration, as the microwave power is progressively increased, the broad P2 peak first gets smeared off and then a multiple peak structure appears, which develops into another narrower second peak (Ps-peak) at high enough microwave powers. In the orientation of plane, Hw ab plane, and Hdc Hw, we report for the first time the appearance and disappearance of a new second peak (P2-like peak) as a function of microwave power. |
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Keywords: | nonresonant microwave absorption Bi2212 single crystal second peak microwave power dependence anisotropy of NMA |
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