首页|Magnetism,heat capacity,magnetocaloric effect,and magneto-transport properties of heavy fermion antiferromagnet CeGaSi
Magnetism,heat capacity,magnetocaloric effect,and magneto-transport properties of heavy fermion antiferromagnet CeGaSi
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We synthesize high-quality single crystal of CeGaSi by a Ga self-flux method and investigate its physical properties through magnetic susceptibility,specific heat and electrical resistivity measurements as well as high pressure effect.Mag-netic measurements reveal that an antiferromagnetic order develops below Tm～10.4 K with magnetic moments orientated in the ab plane.The enhanced electronic specific heat coefficient and the negative logarithmic slope in the resistivity of CeGaSi indicate that the title compound belongs to the family of Kondo system with heavy fermion ground states.The max magnetic entropy change-ΔSmaxM(μ0H⊥c,μ0H=7 T)around Tm is found to reach up to 11.85 J·kg-1·K-1.Remark-ably,both the antiferromagnetic transition temperature and-ln T behavior increase monotonically with pressure applied to 20 kbar(1 bar=105 Pa),indicating that much higher pressure will be needed to reach its quantum critical point.
heavy fermionantiferromagnetic ordermagnetocaloric effect
张黎博、董庆新、白建利、刘乔宇、程靖雯、李存东、刘品宇、孙英睿、黄宇、任治安、陈根富
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Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190,China
School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
Songshan Lake Materials Laboratory,Dongguan 523808,China
国家自然科学基金中国科学院战略规划重点项目(B类)Fund from the Ministry of Science and Technology of ChinaFund of the Synergetic Extreme Condition User Facility(SECUF)
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