Impurity effect on magnetic and thermal properties of <i>S</i> = 3/2 spin gap system Ba3Ca(Ru1−xNbx)2O9-Reference-Cited by-同舟云学术

Impurity effect on magnetic and thermal properties of S = 3/2 spin gap system Ba3Ca(Ru1−xNbx)2O9

Published:2024-02-01 Issue:2 Volume:14 Page:
ISSN:2158-3226
Container-title:AIP Advances
language:en
Short-container-title:

Author:

Ochiai Yuta¹^ORCID,Terasaki Ichiro²^ORCID,Yasui Yukio¹^ORCID

Affiliation:

1. Department of Physics, School of Science and Technology, Meiji University 1 , Kawasaki 214-8571, Japan

2. Department of Physics, School of Science, Nagoya University 2 , Nagoya 464-8602, Japan

Abstract

We have investigated the nonmagnetic impurity effects on magnetic and thermal properties for the spin gap system Ba3CaRu2O9, which has the Ru2O9 dimers composed of two Ru5+ spins (S = 3/2). The measurements of the magnetic susceptibility and specific heat have been carried out for the polycrystalline samples of Ba3Ca(Ru1−xNbx)2O9, where the Ru5+ spins are partially substituted by the non-magnetic Nb5+ ions. We have observed the magnetic behavior of the remained Ru5+ spins derived from breaking the singlet formation by the Nb-doping. These magnetic behaviors can be understood by the S = 3/2 free spin model under an internal magnetic field. Based on the obtained results, the mechanism of the singlet formation of Ba3CaRu2O9 is discussed.

Funder

Grant-in-Aid for Scientific Research

Publisher

AIP Publishing

Link

https://pubs.aip.org/aip/adv/article-pdf/doi/10.1063/9.0000667/19482860/025211_1_9.0000667.pdf

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