Suppression of charge ordering and thermal hysteresis of electronic transport and magnetisation in La0.5Ca0.5Mn1−xNixO3

Ankam Bhaskar, M. S. Huang, Chia-Jyi Liu

Research output: Contribution to journalArticle

Abstract

A series of polycrystalline La0.5Ca0.5Mn1−xNixO3 (x = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) was synthesised using solid state reaction. Measurements in a cooling and warming cycle between 300 and 80 K were carried out to study the Ni-doping effects on the electrical resistivity, thermopower and magnetisation of single-phase La0.5Ca0.5Mn1−xNixO3. Partial substitution of Ni for Mn leads to the suppression of charge ordering state, the evidence of which is shown by the dramatic decrease in electrical resistivity and thermal hysteresis width in electrical resistivity, thermopower and magnetisation. However, the magnitude of both electrical resistivity and thermopower increases with increasing Ni content. This can be attributed to an increase in the Mn4+ concentration, which favours the antiferromagnetic state and leads to a gradual disappearance of ferromagnetic double exchange interaction. Besides, the metal–nonmetal transition temperature decreases with increasing Ni content until x = 0.075, which might arise from increased electron–phonon coupling due to less ordered spins at temperatures above ferromagnetic transition. For samples with x greater than 0.075, no metal–nonmetal transition is observed due to the suppression of double exchange mechanism.

Original languageEnglish
Pages (from-to)139-154
Number of pages16
JournalPhilosophical Magazine
Volume98
Issue number2
DOIs
Publication statusPublished - 2018 Jan 12

Fingerprint

hysteresis
retarding
magnetization
electrical resistivity
electronics
transition temperature
substitutes
solid state
cooling
cycles
heating
interactions
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

@article{d7aac595f6d04a0eaef29581b5b40def,
title = "Suppression of charge ordering and thermal hysteresis of electronic transport and magnetisation in La0.5Ca0.5Mn1−xNixO3",
abstract = "A series of polycrystalline La0.5Ca0.5Mn1−xNixO3 (x = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) was synthesised using solid state reaction. Measurements in a cooling and warming cycle between 300 and 80 K were carried out to study the Ni-doping effects on the electrical resistivity, thermopower and magnetisation of single-phase La0.5Ca0.5Mn1−xNixO3. Partial substitution of Ni for Mn leads to the suppression of charge ordering state, the evidence of which is shown by the dramatic decrease in electrical resistivity and thermal hysteresis width in electrical resistivity, thermopower and magnetisation. However, the magnitude of both electrical resistivity and thermopower increases with increasing Ni content. This can be attributed to an increase in the Mn4+ concentration, which favours the antiferromagnetic state and leads to a gradual disappearance of ferromagnetic double exchange interaction. Besides, the metal–nonmetal transition temperature decreases with increasing Ni content until x = 0.075, which might arise from increased electron–phonon coupling due to less ordered spins at temperatures above ferromagnetic transition. For samples with x greater than 0.075, no metal–nonmetal transition is observed due to the suppression of double exchange mechanism.",
author = "Ankam Bhaskar and Huang, {M. S.} and Chia-Jyi Liu",
year = "2018",
month = "1",
day = "12",
doi = "10.1080/14786435.2017.1396376",
language = "English",
volume = "98",
pages = "139--154",
journal = "Philosophical Magazine",
issn = "1478-6435",
publisher = "Taylor and Francis Ltd.",
number = "2",

}

Suppression of charge ordering and thermal hysteresis of electronic transport and magnetisation in La0.5Ca0.5Mn1−xNixO3 . / Bhaskar, Ankam; Huang, M. S.; Liu, Chia-Jyi.

In: Philosophical Magazine, Vol. 98, No. 2, 12.01.2018, p. 139-154.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Suppression of charge ordering and thermal hysteresis of electronic transport and magnetisation in La0.5Ca0.5Mn1−xNixO3

AU - Bhaskar, Ankam

AU - Huang, M. S.

AU - Liu, Chia-Jyi

PY - 2018/1/12

Y1 - 2018/1/12

N2 - A series of polycrystalline La0.5Ca0.5Mn1−xNixO3 (x = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) was synthesised using solid state reaction. Measurements in a cooling and warming cycle between 300 and 80 K were carried out to study the Ni-doping effects on the electrical resistivity, thermopower and magnetisation of single-phase La0.5Ca0.5Mn1−xNixO3. Partial substitution of Ni for Mn leads to the suppression of charge ordering state, the evidence of which is shown by the dramatic decrease in electrical resistivity and thermal hysteresis width in electrical resistivity, thermopower and magnetisation. However, the magnitude of both electrical resistivity and thermopower increases with increasing Ni content. This can be attributed to an increase in the Mn4+ concentration, which favours the antiferromagnetic state and leads to a gradual disappearance of ferromagnetic double exchange interaction. Besides, the metal–nonmetal transition temperature decreases with increasing Ni content until x = 0.075, which might arise from increased electron–phonon coupling due to less ordered spins at temperatures above ferromagnetic transition. For samples with x greater than 0.075, no metal–nonmetal transition is observed due to the suppression of double exchange mechanism.

AB - A series of polycrystalline La0.5Ca0.5Mn1−xNixO3 (x = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) was synthesised using solid state reaction. Measurements in a cooling and warming cycle between 300 and 80 K were carried out to study the Ni-doping effects on the electrical resistivity, thermopower and magnetisation of single-phase La0.5Ca0.5Mn1−xNixO3. Partial substitution of Ni for Mn leads to the suppression of charge ordering state, the evidence of which is shown by the dramatic decrease in electrical resistivity and thermal hysteresis width in electrical resistivity, thermopower and magnetisation. However, the magnitude of both electrical resistivity and thermopower increases with increasing Ni content. This can be attributed to an increase in the Mn4+ concentration, which favours the antiferromagnetic state and leads to a gradual disappearance of ferromagnetic double exchange interaction. Besides, the metal–nonmetal transition temperature decreases with increasing Ni content until x = 0.075, which might arise from increased electron–phonon coupling due to less ordered spins at temperatures above ferromagnetic transition. For samples with x greater than 0.075, no metal–nonmetal transition is observed due to the suppression of double exchange mechanism.

UR - http://www.scopus.com/inward/record.url?scp=85034222257&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034222257&partnerID=8YFLogxK

U2 - 10.1080/14786435.2017.1396376

DO - 10.1080/14786435.2017.1396376

M3 - Article

AN - SCOPUS:85034222257

VL - 98

SP - 139

EP - 154

JO - Philosophical Magazine

JF - Philosophical Magazine

SN - 1478-6435

IS - 2

ER -