Critical behavior of la0.8ca0.2mn1−xcoxo3 perovskite (0.1 ≤ x ≤ 0.3)

Dorra Turki; Zafar Khan Ghouri; Saeed Al-Meer; Khaled Elsaid; M. I. Ahmad; Ahmed Easa; Gyorgy Remenyi; Sami Mahmood; El Kebir Hlil; Mohamed Ellouze; Foued Elhalouani

doi:10.3390/magnetochemistry3030028

Critical behavior of la0.8ca0.2mn1−xcoxo3 perovskite (0.1 ≤ x ≤ 0.3)

Dorra Turki, Zafar Khan Ghouri, Saeed Al-Meer, Khaled Elsaid, M. I. Ahmad, Ahmed Easa, Gyorgy Remenyi, Sami Mahmood, El Kebir Hlil, Mohamed Ellouze, Foued Elhalouani

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Abstract

The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the paramagnetic PM-ferromagnetic (FM) phase transition for the sample with x = 0 is a first order transition, while it is a second order transition for all doped compounds. The critical exponents β, γ and δ were evaluated using modified Arrott plots (MAP) and the Kouvel-Fisher method (KF). The reliability of the evaluated critical exponents was confirmed by the Widom scaling relation and the universal scaling hypothesis. The values of the critical exponents for the doped compounds were consistent with the 3D-Heisenberg model for magnetic interactions. For x = 0.1, the estimated critical components are found inconsistent with any known universality class. In addition, the local exponent n was determined from the magnetic entropy change and found to be sensitive to the magnetic field in the entire studied temperature range.

Original language	English
Article number	28
Journal	Magnetochemistry
Volume	3
Issue number	3
DOIs	https://doi.org/10.3390/magnetochemistry3030028
Publication status	Published - 17 Sept 2017

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@article{9dbda9b4a3c5461aa760b2629f054bea,

title = "Critical behavior of la0.8ca0.2mn1−xcoxo3 perovskite (0.1 ≤ x ≤ 0.3)",

abstract = "The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the paramagnetic PM-ferromagnetic (FM) phase transition for the sample with x = 0 is a first order transition, while it is a second order transition for all doped compounds. The critical exponents β, γ and δ were evaluated using modified Arrott plots (MAP) and the Kouvel-Fisher method (KF). The reliability of the evaluated critical exponents was confirmed by the Widom scaling relation and the universal scaling hypothesis. The values of the critical exponents for the doped compounds were consistent with the 3D-Heisenberg model for magnetic interactions. For x = 0.1, the estimated critical components are found inconsistent with any known universality class. In addition, the local exponent n was determined from the magnetic entropy change and found to be sensitive to the magnetic field in the entire studied temperature range.",

author = "Dorra Turki and Ghouri, {Zafar Khan} and Saeed Al-Meer and Khaled Elsaid and Ahmad, {M. I.} and Ahmed Easa and Gyorgy Remenyi and Sami Mahmood and Hlil, {El Kebir} and Mohamed Ellouze and Foued Elhalouani",

year = "2017",

month = sep,

day = "17",

doi = "10.3390/magnetochemistry3030028",

language = "English",

volume = "3",

journal = "Magnetochemistry",

issn = "2312-7481",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "3",

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TY - JOUR

T1 - Critical behavior of la0.8ca0.2mn1−xcoxo3 perovskite (0.1 ≤ x ≤ 0.3)

AU - Turki, Dorra

AU - Ghouri, Zafar Khan

AU - Al-Meer, Saeed

AU - Elsaid, Khaled

AU - Ahmad, M. I.

AU - Easa, Ahmed

AU - Remenyi, Gyorgy

AU - Mahmood, Sami

AU - Hlil, El Kebir

AU - Ellouze, Mohamed

AU - Elhalouani, Foued

PY - 2017/9/17

Y1 - 2017/9/17

N2 - The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the paramagnetic PM-ferromagnetic (FM) phase transition for the sample with x = 0 is a first order transition, while it is a second order transition for all doped compounds. The critical exponents β, γ and δ were evaluated using modified Arrott plots (MAP) and the Kouvel-Fisher method (KF). The reliability of the evaluated critical exponents was confirmed by the Widom scaling relation and the universal scaling hypothesis. The values of the critical exponents for the doped compounds were consistent with the 3D-Heisenberg model for magnetic interactions. For x = 0.1, the estimated critical components are found inconsistent with any known universality class. In addition, the local exponent n was determined from the magnetic entropy change and found to be sensitive to the magnetic field in the entire studied temperature range.

AB - The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the paramagnetic PM-ferromagnetic (FM) phase transition for the sample with x = 0 is a first order transition, while it is a second order transition for all doped compounds. The critical exponents β, γ and δ were evaluated using modified Arrott plots (MAP) and the Kouvel-Fisher method (KF). The reliability of the evaluated critical exponents was confirmed by the Widom scaling relation and the universal scaling hypothesis. The values of the critical exponents for the doped compounds were consistent with the 3D-Heisenberg model for magnetic interactions. For x = 0.1, the estimated critical components are found inconsistent with any known universality class. In addition, the local exponent n was determined from the magnetic entropy change and found to be sensitive to the magnetic field in the entire studied temperature range.

UR - https://www.mendeley.com/catalogue/5f0eca20-ecf7-3f85-b03b-444598421ebe/

U2 - 10.3390/magnetochemistry3030028

DO - 10.3390/magnetochemistry3030028

M3 - Article

SN - 2312-7481

VL - 3

JO - Magnetochemistry

JF - Magnetochemistry

IS - 3

M1 - 28

ER -

Critical behavior of la0.8ca0.2mn1−xcoxo3 perovskite (0.1 ≤ x ≤ 0.3)

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