Coexistence of the magnetically ordered and Haldane states in (Y1-xNdx)2BaNiO5

Elena Popova; Sergei Klimin; Marina Popova; RÜdiger Klingeler; Bernd BÜchner; Alexander Vasiliev

doi:10.1051/epjconf/201818503003

Proceedings

Open Access

EPJ Web of Conferences 185, 03003 (2018)
https://doi.org/10.1051/epjconf/201818503003

Coexistence of the magnetically ordered and Haldane states in (Y₁-_xNd_x)₂BaNiO₅

Elena Popova¹^*, Sergei Klimin², Marina Popova², RÜdiger Klingeler³, Bernd BÜchner⁴ and Alexander Vasiliev⁵

¹ National Research University Higher School of Economics, 101000 Moscow, Russia
² Institute of Spectroscopy RAS, 108840 Troitsk, Moscow, Russia
³ Kirchhoff Institute for Physics, University of Heidelberg, INF 227, 69120, Heidelberg, Germany
⁴ Leibniz-Institute for Solid State and Materials Research IFW Dresden, 01171 Dresden, Germany
⁵ Low Temperature Physics Department, Moscow State University, 119991 Moscow, Russia

^* Corresponding author : eapopova@hse.ru

Published online: 4 July 2018

Abstract

The magnetic properties of (Y_1-xNd_x)₂BaNiO₅ with x = 0.01, 0.02, 0.03, 0.04, and 0.05 are investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. We estimate a magnetic contribution of the neodymium subsystem into the magnetic susceptibility and specific heat using temperature dependencies of the splitting of the ground Kramers doublet of the Nd³⁺ ion obtained from spectroscopic experiments. We estimate also the contribution caused by nickel chain breaks and by ferrons. Different scenarios of low-temperature magnetic behavior are discussed.

© The Authors, published by EDP Sciences, 2018

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