Magnetocaloric effect in La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites

C. Gökhan Ünlü; Y. Emre Tanış; M. Burak Kaynar; Telem Şimşek; Şadan Özcan

doi:10.1016/j.jallcom.2017.02.030

Magnetocaloric effect in La_0.7Nd_xBa_(0.3-x)MnO₃(x = 0, 0.05, 0.1) perovskite manganites

C. Gökhan Ünlü
, Y. Emre Tanış
, M. Burak Kaynar
, Telem Şimşek
, Şadan Özcan

Division of Nanotechnology and Nanomedicine (Interdisciplinary)

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

12 Citations (Scopus)

Abstract

We have synthesized La_0.7Nd_xBa_(0.3-x)MnO₃(x = 0, 0.05, 0.1) perovskite manganites by using sol-gel method and investigated structure, magnetic and magnetocaloric properties. Structural analysis revealed that La_0.7Ba_0.3MnO₃and La_0.7Nd_0.05Ba_0.25MnO₃have cubic and La_0.7Nd_0.1Ba_0.2MnO₃rhombohedral structure. The Curie temperature of the samples decreased with increasing Nd content and equals to 303, 293 and 257 K for x = 0, 0.05, 0.1, respectively. We present experimentally by using magnetization isotherms and heat-capacity measurements that room temperature magnetic refrigeration is successfully achieved for La_0.7Nd_0.05Ba_0.25MnO₃structure by tuning the Mn³⁺to Mn⁴⁺ratio. Additionally, zero-field and field-dependent heat-capacity measurements were compared to investigate the accuracy of the value of the adiabatic temperature-change.

Original language	English
Pages (from-to)	58-63
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	704
DOIs	https://doi.org/10.1016/j.jallcom.2017.02.030
Publication status	Published - 2017

Keywords

Adiabatic temperature-change
Curie temperature
Entropy-change
Heat-capacity
Magnetocaloric effect
Perovskite manganite

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10.1016/j.jallcom.2017.02.030

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@article{56a89d61e7ac4d9bbaa3d41b3d1885ef,

title = "Magnetocaloric effect in La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites",

abstract = "We have synthesized La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites by using sol-gel method and investigated structure, magnetic and magnetocaloric properties. Structural analysis revealed that La0.7Ba0.3MnO3and La0.7Nd0.05Ba0.25MnO3have cubic and La0.7Nd0.1Ba0.2MnO3rhombohedral structure. The Curie temperature of the samples decreased with increasing Nd content and equals to 303, 293 and 257 K for x = 0, 0.05, 0.1, respectively. We present experimentally by using magnetization isotherms and heat-capacity measurements that room temperature magnetic refrigeration is successfully achieved for La0.7Nd0.05Ba0.25MnO3structure by tuning the Mn3+to Mn4+ratio. Additionally, zero-field and field-dependent heat-capacity measurements were compared to investigate the accuracy of the value of the adiabatic temperature-change.",

keywords = "Adiabatic temperature-change, Curie temperature, Entropy-change, Heat-capacity, Magnetocaloric effect, Perovskite manganite",

author = "{\"U}nl{\"u}, \{C. G{\"o}khan\} and Tanı{\c s}, \{Y. Emre\} and Kaynar, \{M. Burak\} and Telem {\c S}im{\c s}ek and {\c S}adan {\"O}zcan",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

doi = "10.1016/j.jallcom.2017.02.030",

language = "English",

volume = "704",

pages = "58--63",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Magnetocaloric effect in La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites

AU - Ünlü, C. Gökhan

AU - Tanış, Y. Emre

AU - Kaynar, M. Burak

AU - Şimşek, Telem

AU - Özcan, Şadan

PY - 2017

Y1 - 2017

N2 - We have synthesized La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites by using sol-gel method and investigated structure, magnetic and magnetocaloric properties. Structural analysis revealed that La0.7Ba0.3MnO3and La0.7Nd0.05Ba0.25MnO3have cubic and La0.7Nd0.1Ba0.2MnO3rhombohedral structure. The Curie temperature of the samples decreased with increasing Nd content and equals to 303, 293 and 257 K for x = 0, 0.05, 0.1, respectively. We present experimentally by using magnetization isotherms and heat-capacity measurements that room temperature magnetic refrigeration is successfully achieved for La0.7Nd0.05Ba0.25MnO3structure by tuning the Mn3+to Mn4+ratio. Additionally, zero-field and field-dependent heat-capacity measurements were compared to investigate the accuracy of the value of the adiabatic temperature-change.

AB - We have synthesized La0.7NdxBa(0.3-x)MnO3(x = 0, 0.05, 0.1) perovskite manganites by using sol-gel method and investigated structure, magnetic and magnetocaloric properties. Structural analysis revealed that La0.7Ba0.3MnO3and La0.7Nd0.05Ba0.25MnO3have cubic and La0.7Nd0.1Ba0.2MnO3rhombohedral structure. The Curie temperature of the samples decreased with increasing Nd content and equals to 303, 293 and 257 K for x = 0, 0.05, 0.1, respectively. We present experimentally by using magnetization isotherms and heat-capacity measurements that room temperature magnetic refrigeration is successfully achieved for La0.7Nd0.05Ba0.25MnO3structure by tuning the Mn3+to Mn4+ratio. Additionally, zero-field and field-dependent heat-capacity measurements were compared to investigate the accuracy of the value of the adiabatic temperature-change.

KW - Adiabatic temperature-change

KW - Curie temperature

KW - Entropy-change

KW - Heat-capacity

KW - Magnetocaloric effect

KW - Perovskite manganite

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U2 - 10.1016/j.jallcom.2017.02.030

DO - 10.1016/j.jallcom.2017.02.030

M3 - Article

AN - SCOPUS:85012106651

SN - 0925-8388

VL - 704

SP - 58

EP - 63

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Magnetocaloric effect in La_0.7Nd_xBa_(0.3-x)MnO₃(x = 0, 0.05, 0.1) perovskite manganites

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