%0 Journal Article
%T Study on specific heat and two energy gaps of MgB2 samples prepared by ambient pressure and high pressure<br>常压和高压合成MgB2的低温比热及两个超导能隙研究
%A Zhang Jie
%A Luo Jian-Lin
%A Bai Hai-Yang
%A Chen Zhao-Jia
%A Lin De-Hua
%A Che Guang-Can
%A Ren Zhi-an
%A Zhao Zhong-Xian
%A Jin Duo
%A <br>张杰
%A 雒建林
%A 白海洋
%A 陈兆甲
%A 林德华
%A 车广灿
%A 任治安
%A 赵忠贤
%A 金铎
%J 物理学报
%D 2002
%I 
%X Specific heat of MgB 2 prepared by ambient pressure and high pressure has been measured in temperature range from 6K to 80K.The electron contribution to the specific heat is investigated by considering Einstein mode.A large difference between Dybye temperatures obtained by ultrasonic measurement and fitting of low-temperature specific heat is interpreted.An anomaly of electronic specific heat is observed at 12K,which can be attributed to the second energy gap of MgB 2.The effect from different sample preparation methods,i.e. ambient pressure and high pressure,is primarily discussed.
%K low-temperature specific heat
%K MgB
%K 2
%K energy gap<br>低温比热
%K MgB2
%K 能隙
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=CAD0216E9EBDBFFA&yid=C3ACC247184A22C1&vid=987EDA49D8A7A635&iid=0B39A22176CE99FB&sid=556C1A86E372B606&eid=C7DDDE86E6286CD9&journal_id=1000-3290&journal_name=物理学报&referenced_num=13&reference_num=20