首页|Ferromagnetism and insulating behavior with a logarithmic temperature dependence of resistivity in Pb10-xCux(PO4)6O

Ferromagnetism and insulating behavior with a logarithmic temperature dependence of resistivity in Pb10-xCux(PO4)6O

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Recent claim of discovering above-room-temperature superconductivity(Tc≈400 K)at ambient pressure in copper doped apatite Pb10(PO4)6O has stimulated world-wide enthusiasm and impulse of motion.A lot of follow-up works have been carried out with controversial conclusions.To check whether superconductivity is really present or absent in the material,we need samples which should have a rather pure phase of Pb10-xCux(PO4)6O.Here we report the characterization results from the Pb10-xCux(PO4)6O with a fraction of about 97 wt.％inferred from the fitting to the X-ray diffraction pattern,if assuming Cu2S as the only impurity.The resistivity measurements show that it is a semiconductor characterized roughly by a ln(1/7)temperature dependence in wide temperature region without trace of superconductivity.Magnetization measurements show that it has a general ferromagnetic signal with a weak superparamagnetic background.Many grains of the sample show clear interactions with a NbFeB magnet.The detected Cu concentration is much lower than the expected nominal one.Our results show the absence of metallicity and superconductivity in Pb10_xCux(PO4)6O at ambient pressure,and suggest the presence of strong correlation effect.

superconductivityPb10(PO4)6Oferromagneticcorrelation effect

Yuhang Zhang、Cong Liu、Xiyu Zhu、Hai-Hu Wen

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Center for Superconducting Physics and Materials,National Laboratory of Solid State Microstructures and Department of Physics,National Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaStrategic Priority Research Program(B)of Chinese Academy of Sciences

2022YFA140320112061131001520721701220423111927809XDB25000000

2024

10.1007/s11433-023-2209-7

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(1)
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