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  • ВЗАИМОДЕЙСТВИЯ МАГНИТНЫХ ПОДСИСТЕМ В КВАЗИОДНОМЕРНЫХ ХАЛДЕЙНОВСКИХ МАГНЕТИКАХ (Y1-XNDX)2BANIO5
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Subject
News
September 11, 2026
How to Assess Students Knowledge in the Age of AI
A researcher at HSE University has proposed a flowchart to help lecturers decide how to assess students who use artificial intelligence. It shows where the use of AI should be restricted and where it can be incorporated into the learning process. The article has been published in IT Professional.
September 9, 2026
‘Balkan Hospitality Opens Doors: Studying Dialects on the Verge of Extinction
You cannot study spoken dialects from books. Instead, you need to go to a village, seek out its elders, and earn the trust of local residents before you can record hours of spontaneous stories. This is how Natalia Muravleva, Associate Professor at the Faculty of Humanities, conducts her research. Her internship in Serbia continued her long-standing study of dialects spoken by Macedonian settlers. In this interview, she discusses how diaspora cultural centres help researchers reach informants, why native speakers need to be interviewed only in their own language (otherwise, as she puts it, they may 'break'), and how a single field season helped her finalise her monograph. She also shares warm memories of autumn in Belgrade and of colleagues with whom grammar can be discussed in three languages at once.
September 9, 2026
Scientists Train Neural Network to Generate Process Plans from 3D Models
Researchers at the HSE FCS AI and Digital Science Institute have developed CAD2TechSpec, a framework that converts 3D models of mechanical parts into machining process plans—step-by-step instructions for machine tools. The solution aims to reduce the time required for the design and preparation of technical process documentation in mechanical engineering, aircraft manufacturing, and other high-tech industries. The study findings have been published in PeerJ Computer Science.

 

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?

ВЗАИМОДЕЙСТВИЯ МАГНИТНЫХ ПОДСИСТЕМ В КВАЗИОДНОМЕРНЫХ ХАЛДЕЙНОВСКИХ МАГНЕТИКАХ (Y1-XNDX)2BANIO5

С. 118–119.
Popova E.

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 and establishes a correspondence between experimentally observed anomalies and the mechanisms of interaction of magnetic subsystems.

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

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.
Similar publications
Фазовые переходы под действием магнитного поля в редкоземельных никелатах
Popova E., В кн.: 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. С. 85–87.
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 ...
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
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
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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