Low Temperature Specific Heat of Superconducting MgB<suB>2</suB>

Chin. Phys. Lett.

2001, Vol. 18

Issue (6): 820-822 DOI:

Original Articles

Low Temperature Specific Heat of Superconducting MgB₂

LUO Jian-Lin¹;ZHANG Jie^1,3;CHEN Zhao-Jia¹;BAI Hai-Yang¹;WANG Yu-Peng¹;MENG Ji-Bao¹;JIN Duo¹;REN Zhi-An²;CHE Guang-Can²;ZHAO Zhong-Xian²

¹Laboratory of Extreme Condition Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080 ²National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080 ³Department of Physics, Chongqing University, Chongqing 400044

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LUO Jian-Lin, ZHANG Jie, CHEN Zhao-Jia et al 2001 Chin. Phys. Lett. 18 820-822

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Abstract The specific heat of the recently discovered superconductor MgB₂ has been measured at temperatures ranging from 4.5 to 80 K. Superconducting anomaly ΔC at T_c is clearly observed. The total specific heat in normal state can be well fitted by electronic and phonon contributions. The Debye temperature θ_D is obtained to be 737 K, much larger than other intermetallic superconductors. Normal state electronic specific heat coefficient γ is found to be 2.48 ± 0.5 mJ/mol.K² and ΔC/γT_c is between 1.41 and 2.15.

Keywords: 74.25.Bt 74.60.-w 74.25.Kc

Published: 01 June 2001

PACS:	74.25.Bt	(Thermodynamic properties)
	74.60.-w
	74.25.Kc	(Phonons)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2001/V18/I6/0820

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	LUO Jian-Lin
	ZHANG Jie
	CHEN Zhao-Jia
	BAI Hai-Yang
	WANG Yu-Peng
	MENG Ji-Bao
	JIN Duo
	REN Zhi-An
	CHE Guang-Can
	ZHAO Zhong-Xian

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