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Title: Doping evolution of the second magnetization peak and magnetic relaxation in ( B a 1 - x K x ) F e 2 A s 2 single crystals

Abstract

Here, we present a thorough study of doping dependent magnetic hysteresis and relaxation characteristics in single crystals of (Ba 1-xK x) Fe 2As 2 (0.18 ≤ x ≤ 1). The critical current density J c reaches maximum in the underdoped sample x = 0.26 and then decreases in the optimally doped and overdoped samples. Meanwhile, the magnetic relaxation rate S rapidly increases and the flux creep activation barrier U 0 sharply decreases in the overdoped sample x = 0.70. These results suggest that vortex pinning is very strong in the underdoped regime, but it is greatly reduced in the optimally doped and overdoped regime. Transmission electron microscope (TEM) measurements reveal the existence of dislocations and inclusions in all three studied samples x = 0.38, 0.46, and 0.65. An investigation of the paramagnetic Meissner effect (PME) suggests that spatial variations in T c become small in the samples x = 0.43 and 0.46, slightly above the optimal doping levels. Our results support that two types of pinning sources dominate the (Ba 1-xK x) Fe 2As 2 crystals: (i) strong δl pinning, which results from the fluctuations in the mean free path l and δT c pinning from the spatial variations inmore » T c in the underdoped regime, and (ii) weak δT c pinning in the optimally doped and overdoped regime.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Ames Lab., Ames, IA (United States). Division of Materials Sciences and Engineering
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Division of Materials Sciences and Engineering and Dept. of Physics and Astronomy
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
OSTI Identifier:
1422753
Alternate Identifier(s):
OSTI ID: 1421577
Report Number(s):
IS-J-9358
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1801652
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Yong, Zhou, Lin, Sun, Kewei, Straszheim, Warren E., Tanatar, Makariy A., Prozorov, Ruslan, and Lograsso, Thomas A. Doping evolution of the second magnetization peak and magnetic relaxation in (Ba1-xKx)Fe2As2 single crystals. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.054511.
Liu, Yong, Zhou, Lin, Sun, Kewei, Straszheim, Warren E., Tanatar, Makariy A., Prozorov, Ruslan, & Lograsso, Thomas A. Doping evolution of the second magnetization peak and magnetic relaxation in (Ba1-xKx)Fe2As2 single crystals. United States. doi:10.1103/PhysRevB.97.054511.
Liu, Yong, Zhou, Lin, Sun, Kewei, Straszheim, Warren E., Tanatar, Makariy A., Prozorov, Ruslan, and Lograsso, Thomas A. Fri . "Doping evolution of the second magnetization peak and magnetic relaxation in (Ba1-xKx)Fe2As2 single crystals". United States. doi:10.1103/PhysRevB.97.054511. https://www.osti.gov/servlets/purl/1422753.
@article{osti_1422753,
title = {Doping evolution of the second magnetization peak and magnetic relaxation in (Ba1-xKx)Fe2As2 single crystals},
author = {Liu, Yong and Zhou, Lin and Sun, Kewei and Straszheim, Warren E. and Tanatar, Makariy A. and Prozorov, Ruslan and Lograsso, Thomas A.},
abstractNote = {Here, we present a thorough study of doping dependent magnetic hysteresis and relaxation characteristics in single crystals of (Ba1-xKx) Fe2As2 (0.18 ≤ x ≤ 1). The critical current density Jc reaches maximum in the underdoped sample x = 0.26 and then decreases in the optimally doped and overdoped samples. Meanwhile, the magnetic relaxation rate S rapidly increases and the flux creep activation barrier U0 sharply decreases in the overdoped sample x = 0.70. These results suggest that vortex pinning is very strong in the underdoped regime, but it is greatly reduced in the optimally doped and overdoped regime. Transmission electron microscope (TEM) measurements reveal the existence of dislocations and inclusions in all three studied samples x = 0.38, 0.46, and 0.65. An investigation of the paramagnetic Meissner effect (PME) suggests that spatial variations in Tc become small in the samples x = 0.43 and 0.46, slightly above the optimal doping levels. Our results support that two types of pinning sources dominate the (Ba1-xKx) Fe2As2 crystals: (i) strong δl pinning, which results from the fluctuations in the mean free path l and δTc pinning from the spatial variations in Tc in the underdoped regime, and (ii) weak δTc pinning in the optimally doped and overdoped regime.},
doi = {10.1103/PhysRevB.97.054511},
journal = {Physical Review B},
issn = {2469-9950},
number = 5,
volume = 97,
place = {United States},
year = {2018},
month = {2}
}

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Works referenced in this record:

Very strong intrinsic flux pinning and vortex avalanches in ( Ba , K ) Fe 2 As 2 superconducting single crystals
journal, July 2010


Small-angle neutron scattering study of vortices in superconducting Ba(Fe 0.93 Co 0.07 ) 2 As 2
journal, April 2010


Vortices in superconducting Ba ( Fe 0.93 Co 0.07 ) 2 As 2 studied via small-angle neutron scattering and Bitter decoration
journal, March 2009


Paramagnetic Meissner effect from the self-consistent solution of the Ginzburg-Landau equations
journal, May 1997


Strong pinning and vortex energy distributions in single-crystalline Ba(Fe 1 x Co x ) 2 As 2
journal, September 2011


Paramagnetic Meissner effect in small superconductors
journal, November 1998

  • Geim, A. K.; Dubonos, S. V.; Lok, J. G. S.
  • Nature, Vol. 396, Issue 6707
  • DOI: 10.1038/24110

Evidence for surface barriers and their effect on irreversibility and lower-critical-field measurements in Y-Ba-Cu-O crystals
journal, June 1991


Vortex images on Ba 1 x K x Fe 2 As 2 observed directly by magnetic force microscopy
journal, January 2012


SANS study of vortex lattice structural transition in optimally doped (Ba 1− x K x )Fe 2 As 2
journal, August 2016


Scanning Tunneling Spectroscopy and Vortex Imaging in the Iron Pnictide Superconductor BaFe 1.8 Co 0.2 As 2
journal, March 2009


Dependence of flux-creep activation energy upon current density in grain-aligned YBa 2 Cu 3 O 7 x
journal, August 1990


Vortex structure in BaFe2(As1 − x P x )2 single crystals
journal, January 2013


Superconducting fluctuations in the reversible magnetization of the iron-pnictide Ba 1 x K x Fe 2 As 2
journal, July 2009


Quasiparticle Scattering Induced by Charge Doping of Iron-Pnictide Superconductors Probed by Collective Vortex Pinning
journal, December 2010


Flux vortices and transport currents in type II superconductors
journal, March 1972


Flux pinning in PrFeAsO 0.9 and NdFeAsO 0.9 F 0.1 superconducting crystals
journal, May 2010


Vortices in high-temperature superconductors
journal, October 1994


Intrinsic pinning on structural domains in underdoped single crystals of Ba ( Fe 1 x Co x ) 2 As 2
journal, November 2009


Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba 1 x K x Fe 2 As 2
journal, February 2017


Fishtail and vortex dynamics in the Ni-doped iron pnictide BaFe 1.82 Ni 0.18 As 2
journal, August 2011


Vortex pinning: A probe for nanoscale disorder in iron-based superconductors
journal, June 2012


Transition from elastic to plastic vortex phase and its evolution with quenched disorder in YBa 2 Cu 3 O y single crystals
journal, February 2000


Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1−xCox)2As2
journal, February 2009

  • Yamamoto, A.; Jaroszynski, J.; Tarantini, C.
  • Applied Physics Letters, Vol. 94, Issue 6
  • DOI: 10.1063/1.3081455

Polarized Light Microscopy Study on the Reentrant Phase Transition in a (Ba1 – xKx)Fe2As2 Single Crystal with x = 0.24
journal, November 2016


Magnetic relaxation in high-temperature superconductors
journal, July 1996


Vortex structure in superconducting iron pnictide single crystals
journal, October 2009


Vortex solid-solid phase transition in an untwinned YBa 2 Cu 3 O 7 δ crystal
journal, July 1999


Universality in the current decay and flux creep of Y-Ba-Cu-O high-temperature superconductors
journal, October 1990


Phase diagram of Ba 1 x K x Fe 2 As 2
journal, May 2012


Theory of collective flux creep
journal, November 1989


High-field paramagnetic effect in large crystals of YBa 2 Cu 3 O 7 δ
journal, April 1997


Doping- and irradiation-controlled pinning of vortices in BaFe 2 (As 1 x P x ) 2 single crystals
journal, October 2011


Disorder-Induced Transition to Entangled Vortex Solid in Nd-Ce-Cu-O Crystal
journal, September 1997


Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides
journal, May 2013

  • Blomberg, E. C.; Tanatar, M. A.; Fernandes, R. M.
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms2933

Electronic Phase Separation in the Slightly Underdoped Iron Pnictide Superconductor Ba 1 x K x Fe 2 As 2
journal, March 2009


Surface-sensitive paramagnetic Meissner effect in YBa 2 Cu 3 O x single crystals
journal, October 1995


Possibility of vortex lattice structural phase transition in the superconducting pnictide Ba ( Fe 0.925 Co 0.075 ) 2 As 2
journal, March 2010


Doping – Dependent irreversible magnetic properties of Ba(Fe1−xCox)2As2 single crystals
journal, May 2009


Observation of an anomalous peak in isofield M ( T ) curves in BaFe 2 (As 0.68 P 0.32 ) 2 suggesting a phase transition in the irreversible regime
journal, April 2015

  • S. Salem-Sugui Jr, ; Mosqueira, J.; Alvarenga, A. D.
  • Superconductor Science and Technology, Vol. 28, Issue 5
  • DOI: 10.1088/0953-2048/28/5/055017

Paramagnetic Meissner effect and related dynamical phenomena
journal, March 2003


Paramagnetic moment in field-cooled superconducting plates: Paramagnetic Meissner effect
journal, November 1995


Vortex phase diagram of Ba ( Fe 0.93 Co 0.07 ) 2 As 2 single crystals
journal, December 2008


Origin of the magnetization peak effect in the Nb 3 Sn superconductor
journal, March 2007


Exact solution for flux creep with logarithmic U ( j ) dependence: Self-organized critical state in high- T c superconductors
journal, August 1991

  • Vinokur, V. M.; Feigel’man, M. V.; Geshkenbein, V. B.
  • Physical Review Letters, Vol. 67, Issue 7
  • DOI: 10.1103/PhysRevLett.67.915

Gap in KFe 2 As 2 studied by small-angle neutron scattering observations of the magnetic vortex lattice
journal, July 2011


Magnetization of High-Field Superconductors
journal, January 1964


Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors
journal, June 2013


Flux pinning mechanisms in type II superconductors
journal, August 1974


Flux creep and current relaxation in high- T c superconductors
journal, March 1991

  • Feigel’man, M. V.; Geshkenbein, V. B.; Vinokur, V. M.
  • Physical Review B, Vol. 43, Issue 7
  • DOI: 10.1103/PhysRevB.43.6263

Thermal fluctuations, quenched disorder, phase transitions, and transport in type-II superconductors
journal, January 1991

  • Fisher, Daniel S.; Fisher, Matthew P. A.; Huse, David A.
  • Physical Review B, Vol. 43, Issue 1
  • DOI: 10.1103/PhysRevB.43.130

Observation of ordered vortices with Andreev bound states in Ba0.6K0.4Fe2As2
journal, February 2011

  • Shan, Lei; Wang, Yong-Lei; Shen, Bing
  • Nature Physics, Vol. 7, Issue 4
  • DOI: 10.1038/nphys1908

Upper critical field of high-quality single crystals of KFe 2 As 2
journal, April 2013


Granularity in superconductors: intrinsic properties and processing-dependent effects
journal, May 2001


New-Structure-Type Fe-Based Superconductors: Ca A Fe 4 As 4 ( A = K, Rb, Cs) and Sr A Fe 4 As 4 ( A = Rb, Cs)
journal, March 2016

  • Iyo, Akira; Kawashima, Kenji; Kinjo, Tatsuya
  • Journal of the American Chemical Society, Vol. 138, Issue 10
  • DOI: 10.1021/jacs.5b12571

Vortex structure and magnetic properties of BaFe 2 (As 1−x P x ) 2 single crystals
journal, May 2014


Flux dynamics associated with the second magnetization peak in the iron pnictide Ba 1 x K x Fe 2 As 2
journal, August 2010


Fermi surface reconstruction in ( Ba 1 x K x ) Fe 2 As 2   ( 0.44 x 1 ) probed by thermoelectric power measurements
journal, June 2014


Observation of the Wohlleben effect in YBa 2 Cu 3 O 7 δ single crystals
journal, May 1994


Distinct doping dependence of critical temperature and critical current density in Ba1−xKxFe2As2 superconductor
journal, May 2016

  • Song, Dongjoon; Ishida, Shigeyuki; Iyo, Akira
  • Scientific Reports, Vol. 6, Issue 1
  • DOI: 10.1038/srep26671

Possible Superconductivity above 25 K in Single-Crystalline Co-Doped BaFe 2 As 2
journal, February 2009

  • Nakajima, Yasuyuki; Taen, Toshihiro; Tamegai, Tsuyoshi
  • Journal of the Physical Society of Japan, Vol. 78, Issue 2
  • DOI: 10.1143/JPSJ.78.023702

Onset of Plasticity and Hardening of the Hysteretic Response in the Vortex System of YBa 2 Cu 3 O 7 δ
journal, June 1999


Scaling laws for flux pinning in hard superconductors
journal, March 1973

  • Kramer, Edward J.
  • Journal of Applied Physics, Vol. 44, Issue 3
  • DOI: 10.1063/1.1662353

Plastic Vortex Creep in YBa 2 Cu 3 O 7 x Crystals
journal, August 1996


Vortex-glass phase transition and superconductivity in an underdoped ( Ba , K ) Fe 2 As 2 single crystal
journal, January 2009


Disorder, critical currents, and vortex pinning energies in isovalently substituted BaFe 2 (As 1 x P x ) 2
journal, March 2013


Vortex lattice structure in BaFe 2 ( As 0.67 P 0.33 ) 2 via small-angle neutron scattering
journal, September 2014


Doping-dependent critical current properties in K, Co, and P-doped BaF e 2 A s 2 single crystals
journal, January 2017


Superconductivity and Crystal Structures of (Ba 1− x K x )Fe 2 As 2 ( x =0-1)
journal, September 2008

  • Rotter, Marianne; Pangerl, Michael; Tegel, Marcus
  • Angewandte Chemie International Edition, Vol. 47, Issue 41
  • DOI: 10.1002/anie.200803641

Direct imaging of the structural domains in the iron pnictides A Fe 2 As 2 ( A = Ca , Sr , Ba )
journal, May 2009


Coexistence and Competition of Magnetism and Superconductivity on the Nanometer Scale in Underdoped BaFe 1.89 Co 0.11 As 2
journal, July 2010


Flux dynamics and vortex phase diagram in Ba ( Fe 1 x Co x ) 2 As 2 single crystals revealed by magnetization and its relaxation
journal, January 2010


Probing the anisotropic vortex lattice in the Fe-based superconductor KFe 2 As 2 using small-angle neutron scattering
journal, October 2013


Flux-diffusion-induced anomalies in the field-cooled magnetization of high-temperature superconductors
journal, November 1995


Vortex imaging in Co-doped BaFe2As2
journal, May 2009

  • Eskildsen, M. R.; Vinnikov, L. Ya.; Veshchunov, I. S.
  • Physica C: Superconductivity, Vol. 469, Issue 9-12
  • DOI: 10.1016/j.physc.2009.03.042

Surface Barrier in Type-II Superconductors
journal, January 1964


Fishtail effect and the vortex phase diagram of single crystal Ba0.6K0.4Fe2As2
journal, October 2008

  • Yang, Huan; Luo, Huiqian; Wang, Zhaosheng
  • Applied Physics Letters, Vol. 93, Issue 14
  • DOI: 10.1063/1.2996576

A possible mechanism for the peak effect in type II superconductors
journal, February 1969


Vortex creep and critical current densities in superconducting (Ba,K)Fe 2 As 2 single crystals
journal, July 2012


Anisotropy of the upper critical fields and the paramagnetic Meissner effect in La 1.85 Sr 0.15 CuO 4 single crystals
journal, January 2013


    Works referencing / citing this record:

    Vortex phase diagram study in the superconductor Ca 3 Ir 4 Sn 13
    journal, August 2018

    • Kumar, Santosh; Singh, Ravi P.; Thamizhavel, A.
    • Materials Research Express, Vol. 5, Issue 10
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    Vortex phase diagram study in the superconductor Ca 3 Ir 4 Sn 13
    journal, August 2018

    • Kumar, Santosh; Singh, Ravi P.; Thamizhavel, A.
    • Materials Research Express, Vol. 5, Issue 10
    • DOI: 10.1088/2053-1591/aad99b