Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7

E. Taşarkuyu; A. Coşkun; A. E. Irmak; S. Aktürk; G. Ünlü; Y. Samanciolu; A. Yücel; C. Sarikürkçü; S. Aksoy; M. Acet

doi:10.1016/j.jallcom.2010.12.011

Effect of high temperature sintering on the structural and the magnetic properties of La_1.4Ca_1.6Mn₂O₇

E. Taşarkuyu^*, A. Coşkun, A. E. Irmak, S. Aktürk, G. Ünlü, Y. Samanciolu, A. Yücel, C. Sarikürkçü, S. Aksoy, M. Acet

^*Corresponding author for this work

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

54 Citations (Scopus)

Abstract

We investigate the effect of sintering temperature on the structural and magnetic properties of La_1.4Ca_1.6Mn₂O ₇ double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 and 1673 K) are utilized for the heat treatment. Regardless of the sintering temperature, the tetragonal crystal structure with the I4/mmm space group is stable. However, a reduction in a and an increase in c lattice parameters along with a significant increase in crystallite-size occur on increasing the sintering temperature. This is also accompanied by the growth of grains. Grain-growth and changing crystallite-sizes account for the changes in magnetization, Curie temperature and magnetic entropy-change values. As the sintering temperature increases from 1273 to 1673 K the Curie temperature increases from 225 to 268 K and the magnetic entropy-change increases from 0.58 to 3.1 J kg^-1 K^-1 respectively.

Original language	English
Pages (from-to)	3717-3722
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	9
DOIs	https://doi.org/10.1016/j.jallcom.2010.12.011
Publication status	Published - 3 Mar 2011
Externally published	Yes

Keywords

Curie temperature
Magnetocaloric effect
Perovskite manganites
Sintering temperature

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10.1016/j.jallcom.2010.12.011

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title = "Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7",

abstract = "We investigate the effect of sintering temperature on the structural and magnetic properties of La1.4Ca1.6Mn2O 7 double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 and 1673 K) are utilized for the heat treatment. Regardless of the sintering temperature, the tetragonal crystal structure with the I4/mmm space group is stable. However, a reduction in a and an increase in c lattice parameters along with a significant increase in crystallite-size occur on increasing the sintering temperature. This is also accompanied by the growth of grains. Grain-growth and changing crystallite-sizes account for the changes in magnetization, Curie temperature and magnetic entropy-change values. As the sintering temperature increases from 1273 to 1673 K the Curie temperature increases from 225 to 268 K and the magnetic entropy-change increases from 0.58 to 3.1 J kg-1 K-1 respectively.",

keywords = "Curie temperature, Magnetocaloric effect, Perovskite manganites, Sintering temperature",

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doi = "10.1016/j.jallcom.2010.12.011",

language = "English",

volume = "509",

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T1 - Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7

AU - Taşarkuyu, E.

AU - Coşkun, A.

AU - Irmak, A. E.

AU - Aktürk, S.

AU - Ünlü, G.

AU - Samanciolu, Y.

AU - Yücel, A.

AU - Sarikürkçü, C.

AU - Aksoy, S.

AU - Acet, M.

PY - 2011/3/3

Y1 - 2011/3/3

N2 - We investigate the effect of sintering temperature on the structural and magnetic properties of La1.4Ca1.6Mn2O 7 double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 and 1673 K) are utilized for the heat treatment. Regardless of the sintering temperature, the tetragonal crystal structure with the I4/mmm space group is stable. However, a reduction in a and an increase in c lattice parameters along with a significant increase in crystallite-size occur on increasing the sintering temperature. This is also accompanied by the growth of grains. Grain-growth and changing crystallite-sizes account for the changes in magnetization, Curie temperature and magnetic entropy-change values. As the sintering temperature increases from 1273 to 1673 K the Curie temperature increases from 225 to 268 K and the magnetic entropy-change increases from 0.58 to 3.1 J kg-1 K-1 respectively.

AB - We investigate the effect of sintering temperature on the structural and magnetic properties of La1.4Ca1.6Mn2O 7 double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 and 1673 K) are utilized for the heat treatment. Regardless of the sintering temperature, the tetragonal crystal structure with the I4/mmm space group is stable. However, a reduction in a and an increase in c lattice parameters along with a significant increase in crystallite-size occur on increasing the sintering temperature. This is also accompanied by the growth of grains. Grain-growth and changing crystallite-sizes account for the changes in magnetization, Curie temperature and magnetic entropy-change values. As the sintering temperature increases from 1273 to 1673 K the Curie temperature increases from 225 to 268 K and the magnetic entropy-change increases from 0.58 to 3.1 J kg-1 K-1 respectively.

KW - Curie temperature

KW - Magnetocaloric effect

KW - Perovskite manganites

KW - Sintering temperature

UR - https://www.scopus.com/pages/publications/79551682766

U2 - 10.1016/j.jallcom.2010.12.011

DO - 10.1016/j.jallcom.2010.12.011

M3 - Article

AN - SCOPUS:79551682766

SN - 0925-8388

VL - 509

SP - 3717

EP - 3722

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 9

ER -

Effect of high temperature sintering on the structural and the magnetic properties of La_1.4Ca_1.6Mn₂O₇

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Keywords

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