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Synthesis and resistivity measurements of LK-99
Soo Min Park ; L. Sun ; T. Wu ; Jongho Park ; Changyong Kim ; Jaeyong Kim
한국초전도.저온논문지, 2023, 25(4), , pp.1-4
한국초전도저온학회
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Título:
Synthesis and resistivity measurements of LK-99
Autor:
Soo Min Park
;
L. Sun
;
T. Wu
;
Jongho Park
;
Changyong Kim
;
Jaeyong Kim
Assuntos:
전기공학
É parte de:
한국초전도.저온논문지, 2023, 25(4), , pp.1-4
Notas:
KISTI1.1003/JNL.JAKO202306740404372
Descrição:
Recently, a claim of material, named LK-99 (a lead apatite-based compound), exhibiting a superconducting transition temperature of over 400 K under standard atmospheric pressure, was reported [1, 2]. This claim has generated considerable attention from scientists worldwide. Here, we synthesized five LK-99 samples following the method detailed in the original papers [1, 2], and measured structural and resistivity data for each of these samples. The structure of the synthesized samples (P63/m, a=9.82 Å , c=7.34 Å ) was very close to the reported one. Contrary to the report, however, no hint of room-temperature superconductivity was noted from any of the samples. The results of Energy-dispersive X-ray spectroscopy (EDXS) measurements demonstrate that the atomic distribution in the sample was inhomogenous, and unreacted precursors were included in the samples. To investigate the intrinsic superconducting properties of LK-99, we propose to synthesize samples having high structural purity and chemical uniformity.
Editor:
한국초전도저온학회
Idioma:
Coreano
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