Room temperature magneto-dielectric coupling in the CaMnO3 modified NBT lead-free ceramics

Koyal Suman Samantaray; Ruhul Amin; Saniya Ayaz; A. K. Pathak; Christopher Hanley; A. Mekki; K. Harrabi; Somaditya Sen

doi:10.1007/s00339-023-06513-4

Room temperature magneto-dielectric coupling in the CaMnO₃ modified NBT lead-free ceramics

Koyal Suman Samantaray
, Ruhul Amin
, Saniya Ayaz
, A. K. Pathak
, Christopher Hanley
, A. Mekki
, K. Harrabi
, Somaditya Sen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The sol–gel prepared (1-x)Na_0.5Bi_0.5TiO₃-(x) CaMnO₃ (x = 0, 0.03, 0.06, 0.12) compositions show a Rhombohedral (R3c) phase up to x = 0.06 while a mixed rhombohedral (R3c) and orthorhombic (Pnma) phases for the x = 0.12. The lattice volume consistently decreased with an increase in the CaMnO₃ content. The phase transition temperature (T_c) decreased with an increase in the CaMnO₃ compositions. The room temperature dielectric constant increased, and loss decreased for the x = 0.03 composition due to a decrease in the oxygen vacancy and Bi loss confirmed by the valence state study (XPS). All the compositions show a variation of the room temperature dielectric property with an application of magnetic field confirming a magnetodielectric coupling. The x = 0.06 composition shows the highest negative magnetodielectric coupling constant (MD%) of 3.69 at 100 kHz at an applied field of 5 kG.

Original language	English
Article number	237
Journal	Applied Physics A: Materials Science and Processing
Volume	129
Issue number	4
DOIs	https://doi.org/10.1007/s00339-023-06513-4
State	Published - Apr 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.

Keywords

Dielectric
Lead-free materials
Magnetism
Room temperature magnetodielectric
Sol–gel

ASJC Scopus subject areas

General Chemistry
General Materials Science

Access to Document

10.1007/s00339-023-06513-4

Cite this

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title = "Room temperature magneto-dielectric coupling in the CaMnO3 modified NBT lead-free ceramics",

abstract = "The sol–gel prepared (1-x)Na0.5Bi0.5TiO3-(x) CaMnO3 (x = 0, 0.03, 0.06, 0.12) compositions show a Rhombohedral (R3c) phase up to x = 0.06 while a mixed rhombohedral (R3c) and orthorhombic (Pnma) phases for the x = 0.12. The lattice volume consistently decreased with an increase in the CaMnO3 content. The phase transition temperature (Tc) decreased with an increase in the CaMnO3 compositions. The room temperature dielectric constant increased, and loss decreased for the x = 0.03 composition due to a decrease in the oxygen vacancy and Bi loss confirmed by the valence state study (XPS). All the compositions show a variation of the room temperature dielectric property with an application of magnetic field confirming a magnetodielectric coupling. The x = 0.06 composition shows the highest negative magnetodielectric coupling constant (MD\%) of 3.69 at 100 kHz at an applied field of 5 kG.",

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author = "Samantaray, \{Koyal Suman\} and Ruhul Amin and Saniya Ayaz and Pathak, \{A. K.\} and Christopher Hanley and A. Mekki and K. Harrabi and Somaditya Sen",

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AU - Samantaray, Koyal Suman

AU - Amin, Ruhul

AU - Ayaz, Saniya

AU - Pathak, A. K.

AU - Hanley, Christopher

AU - Mekki, A.

AU - Harrabi, K.

AU - Sen, Somaditya

PY - 2023/4

Y1 - 2023/4

N2 - The sol–gel prepared (1-x)Na0.5Bi0.5TiO3-(x) CaMnO3 (x = 0, 0.03, 0.06, 0.12) compositions show a Rhombohedral (R3c) phase up to x = 0.06 while a mixed rhombohedral (R3c) and orthorhombic (Pnma) phases for the x = 0.12. The lattice volume consistently decreased with an increase in the CaMnO3 content. The phase transition temperature (Tc) decreased with an increase in the CaMnO3 compositions. The room temperature dielectric constant increased, and loss decreased for the x = 0.03 composition due to a decrease in the oxygen vacancy and Bi loss confirmed by the valence state study (XPS). All the compositions show a variation of the room temperature dielectric property with an application of magnetic field confirming a magnetodielectric coupling. The x = 0.06 composition shows the highest negative magnetodielectric coupling constant (MD%) of 3.69 at 100 kHz at an applied field of 5 kG.

AB - The sol–gel prepared (1-x)Na0.5Bi0.5TiO3-(x) CaMnO3 (x = 0, 0.03, 0.06, 0.12) compositions show a Rhombohedral (R3c) phase up to x = 0.06 while a mixed rhombohedral (R3c) and orthorhombic (Pnma) phases for the x = 0.12. The lattice volume consistently decreased with an increase in the CaMnO3 content. The phase transition temperature (Tc) decreased with an increase in the CaMnO3 compositions. The room temperature dielectric constant increased, and loss decreased for the x = 0.03 composition due to a decrease in the oxygen vacancy and Bi loss confirmed by the valence state study (XPS). All the compositions show a variation of the room temperature dielectric property with an application of magnetic field confirming a magnetodielectric coupling. The x = 0.06 composition shows the highest negative magnetodielectric coupling constant (MD%) of 3.69 at 100 kHz at an applied field of 5 kG.

KW - Dielectric

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KW - Room temperature magnetodielectric

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