Ferromagnetic exchange field stabilized antiferromagnetic ordering in a cuprate superconductor
Superconductivity
2022-11-02 v2 Strongly Correlated Electrons
Abstract
We report experimental evidence of formation of antiferromagnetic clusters in composites made of a cuprate superconductor La1.85Sr0.15CuO4 (LCu) and a ferromagnet La0.6Sr0.4CoO3 (LCo). From linear and non-linear ac-susceptibility measurement on this composite material it is found that the exchange field of LCo suppress the dynamic antiferromagnetic spin fluctuation of LCu and convert it into the short range ordered superparamagnetic type antiferromagnetic (AFM) clusters at the cost of superconducting volume fraction. These shrank superconducting volume fraction shows quantum size effect (QSE) and follows DeGennes-Tinkham theory on finite size effect of superconductor.
Keywords
Cite
@article{arxiv.2111.01499,
title = {Ferromagnetic exchange field stabilized antiferromagnetic ordering in a cuprate superconductor},
author = {Biswajit Dutta and A. Banerjee},
journal= {arXiv preprint arXiv:2111.01499},
year = {2022}
}
Comments
The main manuscript and the Supplemental Material are one after another