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  • Фазовые переходы под действием магнитного поля в редкоземельных никелатах
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September 25, 2026
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Фазовые переходы под действием магнитного поля в редкоземельных никелатах

С. 85–87.
Popova E.

The main motif of the crystal structure of rare earth nickelates (Y1-xRx)2BaNiO5 (R = Gd or Nd) are chains of Ni2+ ions with spin S=1 (Haldane chains) directed along the a axis of the crystal. The interaction between rare earth ions R3+ located between the chains is carried out through spin fluctuations of the nickel chain, leading to antiferromagnetic the ordering in the connection. At the same time, the nickel chain remains internally disordered. The field dependences of the magnetization make it possible to determine the change in the magnetic structure of the compound under the influence of an external magnetic field.

Language: Russian
Full text
Text on another site
Keywords: халдейновские цепочки Haldane chainsспиновая щельspin gap
Publication based on the results of:
Quantum phenomena in solid-state composite systems (2023)

In book

СОВРЕМЕННЫЕ ФИЗИКА, МАТЕМАТИКА, ЦИФРОВЫЕ И НАНОТЕХНОЛОГИИ В НАУКЕ И ОБРАЗОВАНИИ (ФМЦН-24) Сборник тезисов III Всероссийской молодежной школы-конференции, посвященной 70-летию со дня рождения профессора Р.М. Асадуллина
Уфа: Башкирский государственный педагогический университет им. М. Акмуллы, 2024.
Similar publications
ВЗАИМОДЕЙСТВИЯ МАГНИТНЫХ ПОДСИСТЕМ В КВАЗИОДНОМЕРНЫХ ХАЛДЕЙНОВСКИХ МАГНЕТИКАХ (Y1-XNDX)2BANIO5
Popova E., В кн.: Сборник тезисов II Всероссийской молодежной школы-конференции «СОВРЕМЕННЫЕ ФИЗИКА, МАТЕМАТИКА, ЦИФРОВЫЕ И НАНОТЕХНОЛОГИИ В НАУКЕ И ОБРАЗОВАНИИ (ФМЦН-23)», посвященной 80-летию со дня рождения д.ф.-м.н., профессора Р.С.Сингатуллина.: Уфа: Издательство БГПУ, 2023. С. 118–119.
The compounds of the (Y1-xNdx)2BaNiO5 family contain two types of magnetic ions: Ni2+ (S=1) and Nd3+ (J=9/2). The interaction between the magnetic subsystems of the studied compounds with different concentrations of neodymium is manifested in anomalies in the temperature dependence of the heat capacity C(T) and the magnetic susceptibility χ(T). The paper analyzes experimental data ...
Added: March 5, 2025
ВЛИЯНИЕ ВНЕШНЕГО МАГНИТНОГО ПОЛЯ НА МАГНИТНЫЕ СВОЙСТВА КВАЗИОДНОМЕРНЫХ ХАЛДЕЙНОВСКИХ МАГНЕТИКОВ (Y1-XNdX)2BaNiO5
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
ВЛИЯНИЕ ВНЕШНЕГО МАГНИТНОГО ПОЛЯ НА МАГНИТНЫЕ СВОЙСТВА КВАЗИОДНОМЕРНЫХ ХАЛДЕЙНОВСКИХ МАГНЕТИКОВ (Y1-xNdx)2BaNiO5 (x = 0.25 и 0.04)
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
Халдейновские цепочки
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
Магнитные взаимодействия в квазиодномерных халдейновских антиферромагнетиках
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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
Coexistence of the magnetically ordered and Haldane states in (Y1-xNdx)2BaNiO5
Popova E., Klimin S. A., Popova M. N. et al., , in: EPJ Web of ConferencesVol. 185: Moscow International Symposium on Magnetism (MISM 2017) .: EDP Sciences, 2018. 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 ...
Added: October 3, 2018
EPJ Web of Conferences
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
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