Magnetization hysteresis and time decay measurements in FeSe0.50Te0.50: Evidence for fluctuation in mean free path induced pinning

被引：49

作者：

Das, P. ^{[1
,2
,3
]}

Thakur, Ajay D. ^{[1
]}

Yadav, Anil K. ^{[1
]}

Tomy, C. V. ^{[1
]}

Lees, M. R. ^{[4
]}

Balakrishnan, G. ^{[4
]}

Ramakrishnan, S. ^{[2
]}

Grover, A. K. ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

[2] Tata Inst Fundamental Res, DCMP&MS, Bombay 400005, Maharashtra, India

[3] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

WEAKLY PINNED CRYSTAL; PHASE-DIAGRAM; SUPERCONDUCTIVITY; VORTICES; LATTICE; REGION;

D O I：

10.1103/PhysRevB.84.214526

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present results of magnetic measurements relating to vortex phase diagram in a single crystal of FeSe0.5Te0.5 which displays a second magnetization peak anomaly for H parallel to c. The possible role of the crystalline anisotropy on vortex pinning is explored via magnetic torque magnetometry. We present evidence in favor of pinning related to spatial variations of the charge carrier mean free path leading to small bundle vortex pinning by randomly distributed (weak) pinning centers for both H parallel to c and H perpendicular to c. This is further corroborated using magnetization data for H parallel to c in a single crystal of FeSe0.35Te0.65. Dynamical response across the second magnetization peak (SMP) anomaly in FeSe0.5Te0.5 has been compared with that across the well-researched phenomenon of peak effect (PE) in a single crystal of CeRu2.

引用

页数：8

共 52 条

[1]

[Anonymous], 1974, JETP

[2] Disorder, metastability, and history dependence in transformations of a vortex lattice [J].

Banerjee, SS ;

Patil, NG ;

Ramakrishnan, S ;

Grover, AK ;

Bhattacharya, S ;

Mishra, PK ;

Ravikumar, G ;

Rao, TVC ;

Sahni, VC ;

Higgins, MJ ;

Tomy, CV ;

Balakrishnan, G ;

Paul, DM .

PHYSICAL REVIEW B, 1999, 59 (09) :6043-6046

[3] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS [J].

BEAN, CP .

REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :31-+

[4] Anisotropic superconducting properties of single-crystalline FeSe0.5Te0.5 [J].

Bendele, M. ;

Weyeneth, S. ;

Puzniak, R. ;

Maisuradze, A. ;

Pomjakushina, E. ;

Conder, K. ;

Pomjakushin, V. ;

Luetkens, H. ;

Katrych, S. ;

Wisniewski, A. ;

Khasanov, R. ;

Keller, H. .

PHYSICAL REVIEW B, 2010, 81 (22)

[5] Muon-spin-spectroscopy study of the penetration depth of FeTe0.5Se0.5 [J].

Biswas, P. K. ;

Balakrishnan, G. ;

Paul, D. M. ;

Tomy, C. V. ;

Lees, M. R. ;

Hillier, A. D. .

PHYSICAL REVIEW B, 2010, 81 (09)

[6] VORTICES IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

BLATTER, G ;

FEIGELMAN, MV ;

GESHKENBEIN, VB ;

LARKIN, AI ;

VINOKUR, VM .

REVIEWS OF MODERN PHYSICS, 1994, 66 (04) :1125-1388

[7] PINNING OF FLUX VORTICES IN TYPE 2 SUPERCONDUCTORS [J].

CAMPBELL, AM ;

EVETTS, JE ;

DEWHUGHE.D .

PHILOSOPHICAL MAGAZINE, 1968, 18 (152) :313-&

[8] FLUX PINNING MECHANISMS IN TYPE-II SUPERCONDUCTORS [J].

DEWHUGHES, D .

PHILOSOPHICAL MAGAZINE, 1974, 30 (02) :293-305

[9] Vortices in superconducting Ba(Fe0.93Co0.07)2As2 studied via small-angle neutron scattering and Bitter decoration [J].

Eskildsen, M. R. ;

Vinnikov, L. Ya. ;

Blasius, T. D. ;

Veshchunov, I. S. ;

Artemova, T. M. ;

Densmore, J. M. ;

Dewhurst, C. D. ;

Ni, N. ;

Kreyssig, A. ;

Bud'ko, S. L. ;

Canfield, P. C. ;

Goldman, A. I. .

PHYSICAL REVIEW B, 2009, 79 (10)

[10] EXPERIMENTAL-EVIDENCE FOR A TRANSVERSE MAGNETIZATION OF THE ABRIKOSOV LATTICE IN ANISOTROPIC SUPERCONDUCTORS [J].

FARRELL, DE ;

WILLIAMS, CM ;

WOLF, SA ;

BANSAL, NP ;

KOGAN, VG .

PHYSICAL REVIEW LETTERS, 1988, 61 (24) :2805-2808

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