| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnetism, heat capacity, magnetocaloric effect, and magneto-transport properties of heavy fermion antiferromagnet CeGaSi |
| Li-Bo Zhang(张黎博)1,2, Qing-Xin Dong(董庆新)1,2, Jian-Li Bai(白建利)1,2, Qiao-Yu Liu(刘乔宇)1,2, Jing-Wen Cheng(程靖雯)1,2, Cun-Dong Li(李存东)1,2, Pin-Yu Liu(刘品宇)1,2, Ying-Rui Sun(孙英睿)1,2, Yu Huang(黄宇)1,2, Zhi-An Ren(任治安)1,2, and Gen-Fu Chen(陈根富)1,2,3,† |
1 Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Songshan Lake Materials Laboratory, Dongguan 523808, China |
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Abstract 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. Magnetic measurements reveal that an antiferromagnetic order develops below $T_{\rm m} \sim 10.4 $K with magnetic moments orientated in the \textit{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 $-\Delta S_{\mathrm{M}}^{\mathrm{\max}}$ ($\mu_{0}H\bot c$, $\mu_0 H = 7$T) around $T_{\rm m}$ is found to reach up to 11.85J$\cdot$kg$^{-1}$$\cdot$K$^{-1}$. Remarkably, both the antiferromagnetic transition temperature and $-\ln T$ behavior increase monotonically with pressure applied to 20kbar (1bar$=$10$^5$Pa), indicating that much higher pressure will be needed to reach its quantum critical point.
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Received: 22 February 2024
Revised: 04 March 2024
Accepted manuscript online: 06 March 2024
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PACS:
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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75.30.Gw
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(Magnetic anisotropy)
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71.20.Eh
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(Rare earth metals and alloys)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12274440), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB33010100), the Fund from the Ministry of Science and Technology of China (Grant No. 2022YFA1403903), and the Fund of the Synergetic Extreme Condition User Facility (SECUF). |
Corresponding Authors:
Gen-Fu Chen
E-mail: gfchen@iphy.ac.cn
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Cite this article:
Li-Bo Zhang(张黎博), Qing-Xin Dong(董庆新), Jian-Li Bai(白建利), Qiao-Yu Liu(刘乔宇), Jing-Wen Cheng(程靖雯), Cun-Dong Li(李存东), Pin-Yu Liu(刘品宇), Ying-Rui Sun(孙英睿), Yu Huang(黄宇), Zhi-An Ren(任治安), and Gen-Fu Chen(陈根富) Magnetism, heat capacity, magnetocaloric effect, and magneto-transport properties of heavy fermion antiferromagnet CeGaSi 2024 Chin. Phys. B 33 067101
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