Published December 15, 2013 | Version v1
Journal article Metadata-only

Quasi-periodic magnetic flux jumps in the superconducting state of Ba0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, Cu, and Zn)

Creators

  • 1. Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810 (Japan)
  • 2. Superconducting Properties Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  • 3. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  • 4. JST, Transformative Research-Project on Iron Pnictides (TRIP), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  • 5. Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588 (Japan)

Description

Highlights: •Flux jumps were observed inpoly-crystalline Ba0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, and Zn). •Much high density of flux jumps were observed for the Zn-doped Ba0.5K0.5Fe1.9Zn0.1As2. •Single crystals of Ba0.5K0.5Fe2As2 and Ba0.5K0.5Fe1.9Zn0.1As2 are absent of flux jumps. -- Abstract: Polycrystals of Ba0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, Cu, and Zn) synthesized at high pressures show quasi-periodic spikes in the magnetization loop at 2 K owing to successive flux jumps, while the single crystals are observed as absence of jumps. The Zn-doped crystal indicates higher frequency flux jumps than that of Zn-free samples, because of the reduction of grain size and enhancement of grain boundary effect. However, the Co-, Ni- and Cu-doped crystals show less jumps duo to the increased granularity. Our present results suggest that the flux jump in the textured polycrystals is controlled largely by the grain boundary as the flux pining effect rather than the intrinsic dopants

Availability note (English)

Available from http://dx.doi.org/10.1016/j.physc.2013.09.005

Additional details

Identifiers

DOI
10.1016/j.physc.2013.09.005;
PII
S0921-4534(13)00418-8;

Publishing Information

Journal Title
Physica. C, Superconductivity
Journal Volume
495
Journal Page Range
p. 192-197
ISSN
0921-4534
CODEN
PHYCE6

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
45065926
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
DENSITY; DOPED MATERIALS; GRAIN BOUNDARIES; GRAIN SIZE; IRON; MAGNETIC FLUX; MAGNETIZATION; MONOCRYSTALS; PERIODICITY; PINES; POLYCRYSTALS; PRESSURE RANGE MEGA PA 10-100; SUPERCONDUCTORS; TEXTURE
Descriptors DEC
CONIFERS; CRYSTALS; ELEMENTS; MATERIALS; METALS; MICROSTRUCTURE; PHYSICAL PROPERTIES; PINOPHYTA; PLANTS; PRESSURE RANGE; PRESSURE RANGE MEGA PA; SIZE; TRANSITION ELEMENTS; TREES; VARIATIONS

Optional Information

Copyright
Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.