Large magnetic moment at sheared ends of single-walled carbon nanotubes<xref rid="cpb_27_12_128101fn1" ref-type="fn">*</xref><fn id="cpb_27_12_128101fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0208403 and 2016YFA0200403), the National Natural Science Foundation of China (Grant Nos. 51472057, 11874129, 91323304, and 11674387), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09040101), and the Baotou Rare Earth Research and Development Centre, Chinese Academy of Sciences (Grant No. GZR 2018001).</p></fn>

Large magnetic moment at sheared ends of single-walled carbon nanotubes**

Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0208403 and 2016YFA0200403), the National Natural Science Foundation of China (Grant Nos. 51472057, 11874129, 91323304, and 11674387), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09040101), and the Baotou Rare Earth Research and Development Centre, Chinese Academy of Sciences (Grant No. GZR 2018001).

Zhang Jian^{1, 4}, Deng Ya^{1, 4}, Hao Ting-Ting², Hu Xiao^{1, 4}, Liu Ya-Yun^{1, 4}, Peng Zhi-Sheng³, Nshimiyimana Jean Pierre^{1, 4}, Chi Xian-Nian^{1, 4}, Wu Pei^{1, 4}, Liu Si-Yu³, Zhang Zhong¹, Li Jun-Jie², Wang Gong-Tang^{3, ‡}, Chu Wei-Guo^{1, §}, Gu Chang-Zhi², Sun Lian-Feng^{1, ¶}

(color online) Magnetization isotherms of typical pristine (black) and its corresponding sheared (red) SWNTs sample at temperatures 200.0 K and 300.0 K, respectively. (a) Plots of magnetization (M) against applied magnetic field at temperature 200.0 K. Increase of magnetizations with external magnetic field can be divided into three sections: fast increase, slow increase and saturation section in field ranges: 0 T–0.4 T, 0.4 T–1.0 T, and 1.0 T–3.0 T, respectively. Both magnetizations are symmetric for positive and negative external magnetic field. Magnetization of sheared SWNTs is larger than that of its corresponding pristine one, suggesting existence of magnetic moment at sheared ends of SWNTs. Top left inset displays hysteretic parts of two magnetizations, indicating both have similar coercivity about 43 mT. (b) Typical curves of magnetization (M) at temperature 300.0 K. Similar characteristics of magnetizations are observed to those in temperature 200.0 K. Values of saturated magnetizations become smaller than that at 200.0 K. Both magnetizations have the same coercivity with value about 31 mT (inset).