Plausiblity of Antiferromagnetism in and near RBCO Vortex Cores: An ME-μSR Analysis-Reference-Cited by-同舟云学术

Plausiblity of Antiferromagnetism in and near RBCO Vortex Cores: An ME-μSR Analysis

Published:2003-08-10 Issue:18n20 Volume:17 Page:3436-3440
ISSN:0217-9792
Container-title:International Journal of Modern Physics B
language:en
Short-container-title:Int. J. Mod. Phys. B

Author:

Boekema C.¹,Tien Y.¹,Hughes L.¹,Ruiz E. J.²,Cavanaugh S. X.³

Affiliation:

1. San Jose State University, San Jose CA 95112 - 0106, USA

2. University of California, Berkeley CA, USA

3. University of Texas, San Antonio TX, USA

Abstract

Maximum-Entropy (ME) analysis is applied to muon-spin-rotation (μSR) data of RBa 2 Cu 3 O y (RBCO; R = Ho , Eu) vortex states. Our focus is on the prospect of antiferromagnetism (AF) associated with the vortex core. The ME transforms are fitted by two μSR signals: the vortex signal and the grain-boundary (GB) signal. Below Tc, the GB signals are well fitted by Gaussians for both EuBCO (Tc = 94 K ) and underdoped HoBCO (Tc = 66 K ). Below 0.5Tc, EuBCO and HoBCO vortex signals are best fitted using Lorentzians, instead of expected Gaussians. An estimate for an effective Neél temperature of an AF vortex core is about 30 K. Our AF-core search results for RBCO vortex states are discussed considering a magnetic origin of cuprate superconductivity.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217979203021150

Reference5 articles.

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