Electronic phase-separation in Mg1-xB2 probed by CESR

R. R. Urbano; P. G. Pagliuso; C. Rettori; S. W. Cheong

doi:10.1016/j.physc.2004.03.212

Electronic phase-separation in Mg_1-xB₂ probed by CESR

R. R. Urbano, P. G. Pagliuso, C. Rettori, S. W. Cheong

School of Arts and Sciences, Physics & Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

Temperature dependent conduction electron spin resonance (CESR) was performed in the normal and vortex-state of Mg_1-xB₂. Fine powder of polycrystalline samples with x≅0 and 0.15 were studied at 9.48 GHz (H_r≃3380 Oe). Our results suggest the interesting effect associated with the presence of Mg deficiency in this compound: a phase separated Mg-vacancy rich (insulating) and Mg-vacancy poor (superconducting metal) regions for the x≃0.15 sample. The depinning temperature, T _p, for x≅0.15 sample was obtained and confronted with previous results.

Original language	English (US)
Pages (from-to)	832-833
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	408-410
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physc.2004.03.212
State	Published - Aug 2004
Event	Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil Duration: May 25 2003 → May 30 2003

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Keywords

Magnetic field distribution
Phase separation
Superconductivity

Access to Document

10.1016/j.physc.2004.03.212

Cite this

@article{421db0085d984bfebe571c527933c01e,

title = "Electronic phase-separation in Mg1-xB2 probed by CESR",

abstract = "Temperature dependent conduction electron spin resonance (CESR) was performed in the normal and vortex-state of Mg1-xB2. Fine powder of polycrystalline samples with x≅0 and 0.15 were studied at 9.48 GHz (Hr≃3380 Oe). Our results suggest the interesting effect associated with the presence of Mg deficiency in this compound: a phase separated Mg-vacancy rich (insulating) and Mg-vacancy poor (superconducting metal) regions for the x≃0.15 sample. The depinning temperature, T p, for x≅0.15 sample was obtained and confronted with previous results.",

keywords = "Magnetic field distribution, Phase separation, Superconductivity",

author = "Urbano, {R. R.} and Pagliuso, {P. G.} and C. Rettori and Cheong, {S. W.}",

note = "Funding Information: This work is supported by FAPESP, CNPq, NSF and USDOE.; Proceedings of the International Conference on Materials ; Conference date: 25-05-2003 Through 30-05-2003",

year = "2004",

month = aug,

doi = "10.1016/j.physc.2004.03.212",

language = "English (US)",

volume = "408-410",

pages = "832--833",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

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TY - JOUR

T1 - Electronic phase-separation in Mg1-xB2 probed by CESR

AU - Urbano, R. R.

AU - Pagliuso, P. G.

AU - Rettori, C.

AU - Cheong, S. W.

N1 - Funding Information: This work is supported by FAPESP, CNPq, NSF and USDOE.

PY - 2004/8

Y1 - 2004/8

N2 - Temperature dependent conduction electron spin resonance (CESR) was performed in the normal and vortex-state of Mg1-xB2. Fine powder of polycrystalline samples with x≅0 and 0.15 were studied at 9.48 GHz (Hr≃3380 Oe). Our results suggest the interesting effect associated with the presence of Mg deficiency in this compound: a phase separated Mg-vacancy rich (insulating) and Mg-vacancy poor (superconducting metal) regions for the x≃0.15 sample. The depinning temperature, T p, for x≅0.15 sample was obtained and confronted with previous results.

AB - Temperature dependent conduction electron spin resonance (CESR) was performed in the normal and vortex-state of Mg1-xB2. Fine powder of polycrystalline samples with x≅0 and 0.15 were studied at 9.48 GHz (Hr≃3380 Oe). Our results suggest the interesting effect associated with the presence of Mg deficiency in this compound: a phase separated Mg-vacancy rich (insulating) and Mg-vacancy poor (superconducting metal) regions for the x≃0.15 sample. The depinning temperature, T p, for x≅0.15 sample was obtained and confronted with previous results.

KW - Magnetic field distribution

KW - Phase separation

KW - Superconductivity

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