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Dive into the research topics where Cunfeng Yao is active.

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Featured researches published by Cunfeng Yao.


Journal of Physics: Conference Series | 2014

The study of damage produced by H-ion and He-ion implantation in Lithium tantalate crystal

Lilong Pang; Z.G. Wang; Cunfeng Yao; Jingjing Sun; Minghuan Cui; Kongfang Wei; Tielong Shen; Y.B. Sheng; Y.B. Zhu; Yunyun Li; Hailong Chang; Wang J; Huiping Zhu

LiTaO3 single crystals were implanted by 100keV H-ion or He-ion. The results indicate that H-ion implantation creates a lower damage level than the He-ion implantation does, but the yield of oxygen vacancy produced by H-ion implantation is far higher than by He-ion implantation.


Chinese Physics Letters | 2018

Structural Distortion and Defects in Ti

Lilong Pang; Bingsheng Li; Tielong Shen; Xing Gao; Xuesong Fang; Ning Gao; Cunfeng Yao; Kongfang Wei; Minghuan Cui; Jianrong Sun; Hailong Chang; W. He; Qing Huang; Zhiguang Wang

Ti3AlC2 samples are irradiated in advance by 3.5MeV Fe-ion to the fluence of 1.0×10 16 ion/cm 2 , and then are implanted by 500 keV He-ion with the fluence of 1.0×10 17 ion/cm 2 at room temperature. The irradiated samples are investigated by grazing incidence x-ray diffraction (GIXRD) and transmission electron microscopy (TEM). GIXRD results show serious structural distortion, but without amorphization in the irradiated samples. Fe-ion irradiation and He-ion implantation create much more serious structural distortion than single Fe-ion irradiation. TEM results reveal that there are a large number of defect clusters in the damage region, and dense spherical He bubbles appear in the He depositional region. It seems that the pre-damage does not influence the growth of He bubbles, but He-ion implantation influences the pre-created defect configurations.


Journal of Physics: Conference Series | 2012

_{3}

Jianrong Sun; Zhiguang Wang; Yuyu Wang; Cunfeng Yao; Kongfang Wei; Tielong Shen

The effects of high energy Kr26+ ions bombardment in polycrystalline Fe3O4 thin films are reported. The magnetic and electrical transport properties of the Fe3O4 thin films, are sensitive to Kr26+ ions bombardment and exhibit diverse behaviors with different fluence. The modifications could be interpreted by an effects related to the stress and damage induced by bombardment. In addtion, possible mechanism of modifications of Fe3O4 ferrite thin films was discussed briefly by using the variable-range hopping (VRH) model.


Journal of the Korean Physical Society | 2009

AlC

Kongfang Wei; Zhiguang Wang; Gou, J (Gou, Jie); Sheng, Yb (Sheng, Yan-Bin); Jin, Gm (Jin, Gen-Ming); Hang Zang; Cunfeng Yao; Ma, Yz (Ma, Yi-Zhun); Shen, Tl (Shen, Tie-Long)

Two kinds of Fe/Cu multilayers with different modulation wavelength were deposited on cleaved Si(100) substrates and then irradiated at room temperature using 400 keV Xe20+ in a wide range of irradiation fluences. As a comparison, thermal annealing at 300-900 degrees C was also carried out in vacuum. Then the samples were analyzed by XRD and the evolution of crystallite structures induced by irradiation was investigated. The obtained XRD patterns showed that, with increase of the irradiation fluence, the peaks of Fe became weaker, the peaks related to Cu-based fcc solid solution and Fe-based bcc solid solution phase became visible and the former became strong gradually. This implied that the intermixing at the Fe/Cu interface induced by ion irradiation resulted in the formation of the new phases which could not be achieved by thermal annealing. The possible intermixing mechanism of Fe/Cu multilayers induced by energetic ion irradiation was briefly discussed.


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2011

_{2}

Jianrong Sun; Zhiguang Wang; Yuyu Wang; Cunfeng Yao; Kongfang Wei; Fashen Li


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2008

irradiated by Fe and He Ions

Hang Zang; Z.G. Wang; X.P. Peng; Y. Song; C.B. Liu; Kongfang Wei; Chonghong Zhang; Cunfeng Yao; Y.Z. Ma; Lihong Zhou; Y.B. Sheng; Jie Gou


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2013

High energy heavy ion bombardment in polycrystalline Fe3O4 thin film

Minghuan Cui; Z.G. Wang; Lilong Pang; Tielong Shen; Cunfeng Yao; Binyao Li; J. Y. Li; X.Z. Cao; P. Zhang; Jingjing Sun; Y.B. Zhu; Yunyun Li; Y.B. Sheng


Journal of Nuclear Materials | 2013

Modification of Fe/Cu Multilayers under 2-MeV Xe20+ Irradiation

Hang Zang; Daxi Guo; Tielong Shen; Chaohui He; Zhiguang Wang; Lilong Pang; Cunfeng Yao; Tao Yang


Vacuum | 2015

Study of the magnetic modifications of Fe3O4 ferrite thin films induced by 2.03 GeV Kr ions irradiation

B.S. Li; Ying Du; Z. G. Wang; Kongfang Wei; H.P. Zhang; Cunfeng Yao; Hailong Chang; Jiayi Sun; Minghuan Cui; Y.B. Sheng; Lilong Pang; Yabin Zhu; X. Gao; P. Luo; Huiping Zhu; Jin Wang; Dong Wang


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2008

Modification of ZnO films under high energy Xe-ion irradiations

Song Yin; E.Q. Xie; Chonghong Zhang; Zhiguang Wang; Lihong Zhou; Yi-Zhong Ma; Cunfeng Yao; Hang Zang; C.B. Liu; Y.B. Sheng; Jie Gou

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Kongfang Wei

Chinese Academy of Sciences

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Zhiguang Wang

Chinese Academy of Sciences

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Tielong Shen

Chinese Academy of Sciences

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Lilong Pang

Chinese Academy of Sciences

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Minghuan Cui

Chinese Academy of Sciences

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Jianrong Sun

Chinese Academy of Sciences

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Huiping Zhu

Chinese Academy of Sciences

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Y.B. Sheng

Chinese Academy of Sciences

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Yabin Zhu

Chinese Academy of Sciences

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Hang Zang

Xi'an Jiaotong University

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