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Coexistence of the magnetically ordered and Haldane states in (Y1-xNdx)2BaNiO5
Ch. 03003. P. 1-4.
The magnetic properties of (Y1-xNdx)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 is discussed.
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In book
Vol. 185: Moscow International Symposium on Magnetism (MISM 2017) . , EDP Sciences, 2018
Popova E., Klimin S. A., Popova M. N. et al., [б.и.], 2018
The magnetic properties of (Y1-xNdx)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 ...
Added: October 3, 2018
Popova E., Klimin S. A., Popova M. N. et al., Physical Review B: Condensed Matter and Materials Physics 2017
The magnetic properties of (Y1-xNdx)2BaNiO5 with different concentration of neodymium are investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. We estimate a magnetic contribution of the neodymium subsystem into magnetic susceptibility and specific heat using temperature dependences of the splitting of the ground Kramers doublet of the Nd3+ ion obtained from spectroscopic ...
Added: December 7, 2016
Popova E., Никифоров А. В., Доклады Академии наук высшей школы Российской Федерации 2017 № 1 (34) С. 19-30
Disordered ground state with a gap in the spectrum of the magnetic excitation spectrum is realized in the compounds that contain the chains of the magnetic ions with S = 1 spins (Haldane chains). In framework of VBS model, each S = 1 spin can be represented as two pseudo-particle with S = 1/2 spins ...
Added: December 5, 2016
Popova E., Klimin S. A., Popova M. N. et al., Journal of Magnetism and Magnetic Materials 2013 Vol. 331 P. 133-139
We present the magnetic properties of (Y1-xNdx) 2BaNiO5 (x=1, 0.15) investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. Magnetic ordering occurs at 47 K and 13 K in the compounds with x=1 and x=0.15, respectively. We estimate the magnetic contribution of the neodymium subsystem to magnetization and specific heat using temperature dependences ...
Added: February 4, 2013
Popova E., В кн. : Фундаментальная математика и ее приложения в естествознании: спутник Международной научной конференции "Уфимская осенняя математическая школа-2022". Тезисы докладов ХIII Международной школы-конференции студентов, аспирантов и молодых ученых, посвященной 50-летию образования математического и физического факультетов БашГУ. : Уфа : РИЦ БашГУ, 2022. С. 150-150.
In this paper, the field dependences of magnetization M(B) and temperature dependences of heat capacity C(T,B) were investigated for compounds of the (Y1-xNdx)2BaNiO5 family with different concentrations of neodymium in the presence of an external magnetic field ...
Added: March 23, 2023
Popova E., Klimin S. A., Popova M. N. et al., Journal of Low Temperature Physics 2016 Vol. 185 No. 5 P. 692-700
Magnetic properties of (Y1−xNdx )2BaNiO5 with x = 1; 0.25; 0.15; and 0.04 are investigated by means of specific heat, magnetic susceptibility, and spectroscopic measurements. We estimate a magnetic contribution of the neodymium subsystem into a total specific heat and magnetic susceptibility using spectroscopic data.We showthat the nickel subsystem is intrinsically disordered in thewhole temperature ...
Added: March 14, 2016
Popova E., Известия Уфимского научного центра РАН 2023 № 1 С. 75-80
In the compounds of the (Y1-xNdx)2BaNiO5 family, the paradoxical coexistence of the Haldane phase and spin waves is realized. The magnetic ordering in the system is caused by the interaction of Nd3+ ions through spin fluctuations of a nickel chain, which remains internally disordered. Nd3+ magnetic moments do not deviate from the c axis of ...
Added: March 22, 2023
EDP Sciences, 2018
The magnetic properties of (Y1-xNdx)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 ...
Added: October 3, 2018
Popova E., Екомасов Е. Г., Известия Уфимского научного центра РАН 2021 № 1 С. 49-55
In a number of quasi-one-dimensional magnets, transition metal ions obeying the motives of the crystal lattice can form chains of integer spins that are distant from each other, named Haldane chains. This paper provides a brief overview of the magnetic properties of Haldane chains and considers some compounds containing such chains. The main features of ...
Added: December 28, 2020
Popova E., В кн. : Фундаментальная математика и ее приложения в естествознании: тезисы докладов XI Международной школы-конференции студентов, аспирантов и молодых ученых (г. Уфа, 11 – 14 ноября 2020 г.). : НИЦ «АЭТЕРНА», 2020. С. 128-129.
In this paper, the temperature dependences of the heat capacity C(T) and magnetic susceptibility χ(T) of polycrystalline samples of the (Y1-xndx)2banio5 family are studied in a wide range of concentrations, from x = 0.01 to x = 1. The analysis of the dependences of χ (T) showed that in all the studied compounds in the ...
Added: December 28, 2020
Popova E., Vasil’ev A. N., Klimin S. A. et al., Журнал экспериментальной и теоретической физики 2010 Т. 138 № 2(8) С. 231-235
Исследованы температурные зависимости теплоемкости и спектры пропускания квазиодномерных халдейновских магнетиков (Y1-xNdx)2BaNiO5 (x = 1, 0.75, 0.50, 0.25). Во всех исследованных соединениях происходит магнитное упорядочение. В упорядоченном состоянии внутреннее магнитное поле приводит к расщеплению основного крамерсовского дублета иона Nd3+. Температурная зависимость величины расщепления, полученная из спектроскопических измерений, использовалась для расчета аномалии Шоттки на теплоемкости. В соединениях ...
Added: April 12, 2012
Попова Е.А., Климин С. А., Попова М. Н. et al., Журнал экспериментальной и теоретической физики 2014 Т. 145 № 4 С. 697-708
The temperature dependences of the heat capacity, the magnetic susceptibility, and the splitting of the ground Kramers doublet of the Nd3+ ion in the chain magnet Nd2BaNiO5 are studied. An antiferromagnetic phase transition manifests itself as anomalies in all these dependences. The parameters of the Nd–Ni and Nd–Nd interactions are estimated. The field dependence of ...
Added: December 3, 2013