Composition dependence of the multifunctional properties of Nd-doped Bi4Ti3O12 ceramics

Sample preparation, evolution of the crystal structure with Nd content at room temperature, as well as dielectric and magnetic properties of polycrystalline Bi4 − xNdxTi3O12 solid solutions (x = 0.0, 0.5, 1.0, 1.5, and 2.0) are reported. These solid solutions were structurally characterized by X-ray powder diffraction using Rietveld refinements. For x ≤ 1.0, the samples crystallize in an orthorhombic symmetry. The structural data could be refined using the polar orthorhombic space group B2cb. The orthorhombicity decreases with increasing Nd3+ concentration, and a paraelectric tetragonal structure (space group I4/mmm) is stabilized for x > 1.The ferroelectric Curie temperature was found to monotonously decrease with increasing Nd concentration. A polar-to-nonpolar phase transition takes place near x = 1, reflecting the existence of a morphotropic phase boundary between 1.0 < x < 1.5 at room temperature. All samples were found to be paramagnetic down to 5 K, however, the presence of significant antiferromagnetic interaction is inferred from Curie–Weiss analyses of the temperature dependence of the magnetic susceptibility of the doped samples. The effect of Nd3+ substitution on structure–property relationship is discussed and compared to that of other lanthanide cations. © 2017, The Author(s).

Авторы
Ivanov S.A.1, 2 , Sarkar T.1 , Fortalnova E.A. 3 , Politova E.D. 2 , Stefanovich S.Y. 2 , Safronenko M.G. 3 , Nordblad P.1 , Mathieu R.1
Редакторы
-
Издательство
Springer New York LLC
Номер выпуска
11
Язык
Английский
Страницы
7692-7707
Статус
Опубликовано
Подразделение
-
Номер
-
Том
28
Год
2017
Организации
  • 1 Department of Engineering Sciences, Uppsala University, Box 534, Uppsala, 75121, Sweden
  • 2 Karpov Institute of Physical Chemistry, ul. Vorontsovo Pole, 10, Moscow, 105064, Russian Federation
  • 3 RUDN University, ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Ключевые слова
Magnetic susceptibility; Neodymium alloys; Rietveld refinement; Solid solutions; Temperature distribution; X ray powder diffraction; Antiferro-magnetic interactions; Composition dependence; Dielectric and magnetic properties; Morphotropic phase boundaries; Multifunctional properties; Orthorhombic space groups; Orthorhombic symmetry; Temperature dependence; Crystal structure
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/5496/