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Title: Influence of phase composition on the reentrant superconducting properties of Tm{sub 2}Fe{sub 3}Si{sub 5}

Abstract

The compound Tm{sub 2}Fe{sub 3}Si{sub 5} is the only known reentrant superconductor in which superconductivity is destroyed at the antiferromagnetic transition. Widely differing behavior has been reported in the literature regarding the occurrence of superconductivity ranging from transition temperatures around 1.7 K at atmospheric pressure to no superconductivity except under applied hydrostatic pressure. In order to clarify this situation, we carried out ac-susceptibility measurements under applied pressure and magnetization measurements as a function of phase composition within the homogeneity range of the compound and on multiphase samples. For single-phase samples, {ital T}{sub {ital c}} decreases strongly in the whole pressure range with growing stoichiometric ratio Fe/Si. For multiphase samples, a shift of the {ital T}{sub {ital c}} vs pressure curves to lower pressure values was observed. The high-temperature part of the susceptibility follows a Curie-Weiss law independent of phase composition which amounts to an effective magnetic moment per Tm atom of 7.0{mu}{sub {ital B}}. With our results we are able to explain all the observed sample dependence of {ital T}{sub {ital c}} with a combination of substitution effects in the homogeneity range of this compound and internal stress effects caused by impurity phases. {copyright} {ital 1996 The American Physical Society.}

Authors:
; ;  [1]
  1. Physikalisches Institut, Universitaet Bayreuth, 95440 Bayreuth (Germany)
Publication Date:
OSTI Identifier:
283905
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 53; Journal Issue: 18; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; IRON SILICIDES; SUPERCONDUCTIVITY; THULIUM SILICIDES; ANTIFERROMAGNETISM; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; PRESSURE DEPENDENCE; TRANSITION TEMPERATURE; CURIE-WEISS LAW; MAGNETIC MOMENTS; PHASE STUDIES; REENTRANT SUPERCONDUCTORS

Citation Formats

Schmidt, H, Mueller, M, and Braun, H F. Influence of phase composition on the reentrant superconducting properties of Tm{sub 2}Fe{sub 3}Si{sub 5}. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.53.12389.
Schmidt, H, Mueller, M, & Braun, H F. Influence of phase composition on the reentrant superconducting properties of Tm{sub 2}Fe{sub 3}Si{sub 5}. United States. doi:10.1103/PhysRevB.53.12389.
Schmidt, H, Mueller, M, and Braun, H F. Wed . "Influence of phase composition on the reentrant superconducting properties of Tm{sub 2}Fe{sub 3}Si{sub 5}". United States. doi:10.1103/PhysRevB.53.12389.
@article{osti_283905,
title = {Influence of phase composition on the reentrant superconducting properties of Tm{sub 2}Fe{sub 3}Si{sub 5}},
author = {Schmidt, H and Mueller, M and Braun, H F},
abstractNote = {The compound Tm{sub 2}Fe{sub 3}Si{sub 5} is the only known reentrant superconductor in which superconductivity is destroyed at the antiferromagnetic transition. Widely differing behavior has been reported in the literature regarding the occurrence of superconductivity ranging from transition temperatures around 1.7 K at atmospheric pressure to no superconductivity except under applied hydrostatic pressure. In order to clarify this situation, we carried out ac-susceptibility measurements under applied pressure and magnetization measurements as a function of phase composition within the homogeneity range of the compound and on multiphase samples. For single-phase samples, {ital T}{sub {ital c}} decreases strongly in the whole pressure range with growing stoichiometric ratio Fe/Si. For multiphase samples, a shift of the {ital T}{sub {ital c}} vs pressure curves to lower pressure values was observed. The high-temperature part of the susceptibility follows a Curie-Weiss law independent of phase composition which amounts to an effective magnetic moment per Tm atom of 7.0{mu}{sub {ital B}}. With our results we are able to explain all the observed sample dependence of {ital T}{sub {ital c}} with a combination of substitution effects in the homogeneity range of this compound and internal stress effects caused by impurity phases. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.53.12389},
journal = {Physical Review, B: Condensed Matter},
number = 18,
volume = 53,
place = {United States},
year = {1996},
month = {5}
}