Structure, magnetization, specific heat, and microwave properties of KxFe2-ySe2

被引：4

作者：

Yazici, D. ^{[1
,2
,5
]}

Basaran, Ali C. ^{[1
,2
,3
]}

Ramirez, J. G. ^{[1
,2
,4
]}

Schuller, Ivan K. ^{[1
,2
]}

Maple, M. B. ^{[1
,2
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Ctr Adv Nanosci, La Jolla, CA 92093 USA

[3] Gebze Inst Technol, Dept Phys, TR-41400 Gebze, Kocaeli, Turkey

[4] Univ Los Andes, Dept Phys, Bogota 111711, Colombia

[5] Artvin Coruh Univ, Fac Hlth Sci, TR-08000 Artvin, Turkey

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2016年 / 29卷 / 08期

关键词：

superconductivity; microwave properties; specific heat; SUPERCONDUCTIVITY; TEMPERATURE;

D O I：

10.1088/0953-2048/29/8/085015

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Temperature-dependent magnetization, specific heat, and magnetic field modulated microwave spectroscopy (MFMMS) measurements were performed on single crystals of KxFe2-ySe2. Magnetization measurements yield a superconducting transition temperature (T-c) of similar to 30 K, with a diamagnetic shielding fraction of nearly 90%. Specific heat measurements revealed a 'jump' at T-c, Delta C/T vertical bar T-c, of about 6.8 +/- 1 mJ mol(-1) K-2, consistent with bulk superconductivity in KxFe2-ySe2. Moreover, MFMMS measurements detect the superconductivity of KxFe2-ySe2. with a peak with an onset at T-c(mu) similar to 28 K, close to the values of T-c determined from the magnetization and specific heat measurements. The presence and the shape of the low temperature MFMMS signal could be ascribed to a complex dissipation mechanism and percolative superconductivity.

引用

页数：6

共 38 条

[1]

Bohandy J., 1988, Journal of Superconductivity, V1, P191, DOI 10.1007/BF00617663

[2] ORIGIN OF SUPERCONDUCTIVE GLASSY STATE AND EXTRINSIC CRITICAL CURRENTS IN HIGH-TC OXIDES [J].

DEUTSCHER, G ;

MULLER, KA .

PHYSICAL REVIEW LETTERS, 1987, 59 (15) :1745-1747

[3] MECHANISMS OF FIELD-DEPENDENT MICROWAVE-ABSORPTION IN HIGH-TC CERAMIC SUPERCONDUCTORS [J].

DULCIC, A ;

RAKVIN, B ;

POZEK, M .

EUROPHYSICS LETTERS, 1989, 10 (06) :593-598

[4] Fe-based superconductivity with Tc=31 K bordering an antiferromagnetic insulator in (Tl,K) FexSe2 [J].

Fang, Ming-Hu ;

Wang, Hang-Dong ;

Dong, Chi-Heng ;

Li, Zu-Juan ;

Feng, Chun-Mu ;

Chen, Jian ;

Yuan, H. Q. .

EPL, 2011, 94 (02)

[5]

Gopal E. S. R., 1966, Specific Heat in Low Temperature

[6] Search for Superconductivity in Micrometeorites [J].

Guenon, S. ;

Ramirez, J. G. ;

Basaran, Ali C. ;

Wampler, J. ;

Thiemens, M. ;

Taylor, S. ;

Schuller, Ivan K. .

SCIENTIFIC REPORTS, 2014, 4

[7] Superconductivity in the iron selenide KxFe2Se2 (0 ≤x≤1.0) [J].

Guo, Jiangang ;

Jin, Shifeng ;

Wang, Gang ;

Wang, Shunchong ;

Zhu, Kaixing ;

Zhou, Tingting ;

He, Meng ;

Chen, Xiaolong .

PHYSICAL REVIEW B, 2010, 82 (18)

[8]

Hosono H, 2008, J PHYS SOC JPN, V77, P1

[9] To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report [J].

Ishida, Kenji ;

Nakai, Yusuke ;

Hosono, Hideo .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2009, 78 (06)

[10] A NOVEL MICROWAVE TECHNIQUE FOR DETECTION OF SUPERCONDUCTIVITY [J].

KIM, BF ;

BOHANDY, J ;

MOORIANI, K ;

ADRIAN, FJ .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (06) :2029-2032

← 1 2 3 4 →