首页|Pressure-induced magnetic phase and structural transition in SmSb2

Pressure-induced magnetic phase and structural transition in SmSb2

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Motivated by the recent discovery of unconventional superconductivity around a magnetic quantum critical point in pressurized CeSb2,here we present a high-pressure study of an isostructural antiferromagnetic(AFM)SmSb2 through electrical transport and synchrotron x-ray diffraction measurements.At PC～2.5 GPa,we found a pressure-induced mag-netic phase transition accompanied by a Cmca→ P4/nmm structural phase transition.In the pristine AFM phase below PC,the AFM transition temperature of SmSb2 is insensitive to pressure;in the emergent magnetic phase above PC,however,the magnetic critical temperature increases rapidly with increasing pressure.In addition,at ambient pressure,the magne-toresistivity(MR)of SmSb2 increases suddenly upon cooling below the AFM transition temperature and presents linear nonsaturating behavior under high field at 2 K.With increasing pressure above PC,the MR behavior remains similar to that observed at ambient pressure,both in terms of temperature-and field-dependent MR.This leads us to argue an AFM-like state for SmSb2 above PC.Within the investigated pressure of up to 45.3 GPa and the temperature of down to 1.8 K,we found no signature of superconductivity in SmSb2.

high pressureantiferromagnetmagnetoresistivitystructural transition

李涛、王舒阳、陈绪亮、陈春华、房勇、杨昭荣

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Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China

Anhui Key Laboratory of Low-Energy Quantum Materials and Devices,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences,Hefei 230031,China

Jiangsu Laboratory of Advanced Functional Materials,Department of Physics,Changshu Institute of Technology,Changshu 215500,China

Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China

Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China

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国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金中国博士后科学基金Hefei Institutes of Physical Science,Chinese Academy of Sciences the Director's Fundation ofBasic Research Program of the Chinese Academy of Sciences Based on Major Scientific Infrastructures

2023YFA14061022022YFA160260312374049121743952023M743542YZJJ2024QN41JZHKYPT-2021-08

2024

10.1088/1674-1056/ad362c

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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