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

[11]

Kittel C., 2018, Introduction to Solid State Physics

[12]

Larson A C, 2000, TECHNICAL REPORT

[13] Transport properties and anisotropy of Rb1-xFe2-ySe2 single crystals [J].

Li, Chun-Hong ;

Shen, Bing ;

Han, Fei ;

Zhu, Xiyu ;

Wen, Hai-Hu .

PHYSICAL REVIEW B, 2011, 83 (18)

[14] KFe2Se2 is the Parent Compound of K-Doped Iron Selenide Superconductors [J].

Li, Wei ;

Ding, Hao ;

Li, Zhi ;

Deng, Peng ;

Chang, Kai ;

He, Ke ;

Ji, Shuaihua ;

Wang, Lili ;

Ma, Xucun ;

Hu, Jiang-Ping ;

Chen, Xi ;

Xue, Qi-Kun .

PHYSICAL REVIEW LETTERS, 2012, 109 (05)

[15] Magnetism in Fe-based superconductors [J].

Lumsden, M. D. ;

Christianson, A. D. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (20)

[16] Superconductivity gets an iron boost [J].

Mazin, Igor I. .

NATURE, 2010, 464 (7286) :183-186

[17]

Medvedev S, 2009, NAT MATER, V8, P630, DOI [10.1038/NMAT2491, 10.1038/nmat2491]

[18] Anion height dependence of Tc for the Fe-based superconductor [J].

Mizuguchi, Y. ;

Hara, Y. ;

Deguchi, K. ;

Tsuda, S. ;

Yamaguchi, T. ;

Takeda, K. ;

Kotegawa, H. ;

Tou, H. ;

Takano, Y. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2010, 23 (05)

[19] Transport properties of the new Fe-based superconductor KxFe2Se2 (Tc=33 K) [J].

Mizuguchi, Yoshikazu ;

Takeya, Hiroyuki ;

Kawasaki, Yasuna ;

Ozaki, Toshinori ;

Tsuda, Shunsuke ;

Yamaguchi, Takahide ;

Takano, Yoshihiko .

APPLIED PHYSICS LETTERS, 2011, 98 (04)

[20] SUPERCONDUCTIVITY IN BULK AND THIN-FILMS OF LA1.85SR0.15CUO4-DELTA AND BA2YCU3O7-DELTA [J].

MOORJANI, K ;

BOHANDY, J ;

ADRIAN, FJ ;

KIM, BF ;

SHULL, RD ;

CHIANG, CK ;

SWARTZENDRUBER, LJ ;

BENNETT, LH .

PHYSICAL REVIEW B, 1987, 36 (07) :4036-4038

← 1 2 3 4 →