Study on the influence of magnetic phase transitions on the magnetocaloric effect in Sm0.7Sr0.3Mn0.95Fe 0.05O3 manganite

E. K. Abdel-Khalek; A. F. Salem; E. A. Mohamed

doi:10.1016/j.jallcom.2014.04.092

Study on the influence of magnetic phase transitions on the magnetocaloric effect in Sm_0.7Sr_0.3Mn_0.95Fe _0.05O₃ manganite

E. K. Abdel-Khalek^*
, A. F. Salem
, E. A. Mohamed

^*Corresponding author for this work

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

17 Scopus citations

Abstract

In this work, the structural, magnetic, magnetocaloric effect (MCE) and refrigerant capacity (RC) properties of nanosize Sm_0.7Sr _0.3Mn_0.95Fe_0.05O₃ manganite have been investigated. Structural characterization shows that this sample has orthorhombic (Pbnm) phase with the small impurities (Mn₃O ₄). The sample undergoes second order paramagnetic to ferromagnetic transition at T_C = 90 K followed by two types of magnetic states at T < T_C, which is formed by the presence of second order charge ordered at T_CO = 28 and first order antiferromagnetic clusters at T_N = 18 K. The magnetic entropy change ΔS_M changes from negative around T_C to positive around T_CO and T _N indicating the presence of normal and inverse MCEs. The influence of first and second order magnetic phase transitions on the MCE and RC are reported.

Original language	English
Pages (from-to)	180-184
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	608
DOIs	https://doi.org/10.1016/j.jallcom.2014.04.092
State	Published - 25 Sep 2014

Bibliographical note

Funding Information:
A.F. Salem would like to acknowledge the support of King Fahd University of Petroleum & Minerals.

Keywords

Magnetization
Magnetocaloric effect
Nanosize manganite
Refrigerant capacity

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2014.04.092

Cite this

@article{9f9b95621e2541eeaf01d5dcb554684b,

title = "Study on the influence of magnetic phase transitions on the magnetocaloric effect in Sm0.7Sr0.3Mn0.95Fe 0.05O3 manganite",

abstract = "In this work, the structural, magnetic, magnetocaloric effect (MCE) and refrigerant capacity (RC) properties of nanosize Sm0.7Sr 0.3Mn0.95Fe0.05O3 manganite have been investigated. Structural characterization shows that this sample has orthorhombic (Pbnm) phase with the small impurities (Mn3O 4). The sample undergoes second order paramagnetic to ferromagnetic transition at TC = 90 K followed by two types of magnetic states at T < TC, which is formed by the presence of second order charge ordered at TCO = 28 and first order antiferromagnetic clusters at TN = 18 K. The magnetic entropy change ΔSM changes from negative around TC to positive around TCO and T N indicating the presence of normal and inverse MCEs. The influence of first and second order magnetic phase transitions on the MCE and RC are reported.",

keywords = "Magnetization, Magnetocaloric effect, Nanosize manganite, Refrigerant capacity",

author = "Abdel-Khalek, \{E. K.\} and Salem, \{A. F.\} and Mohamed, \{E. A.\}",

note = "Funding Information: A.F. Salem would like to acknowledge the support of King Fahd University of Petroleum \& Minerals.",

year = "2014",

month = sep,

day = "25",

doi = "10.1016/j.jallcom.2014.04.092",

language = "English",

volume = "608",

pages = "180--184",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Study on the influence of magnetic phase transitions on the magnetocaloric effect in Sm0.7Sr0.3Mn0.95Fe 0.05O3 manganite

AU - Abdel-Khalek, E. K.

AU - Salem, A. F.

AU - Mohamed, E. A.

N1 - Funding Information: A.F. Salem would like to acknowledge the support of King Fahd University of Petroleum & Minerals.

PY - 2014/9/25

Y1 - 2014/9/25

N2 - In this work, the structural, magnetic, magnetocaloric effect (MCE) and refrigerant capacity (RC) properties of nanosize Sm0.7Sr 0.3Mn0.95Fe0.05O3 manganite have been investigated. Structural characterization shows that this sample has orthorhombic (Pbnm) phase with the small impurities (Mn3O 4). The sample undergoes second order paramagnetic to ferromagnetic transition at TC = 90 K followed by two types of magnetic states at T < TC, which is formed by the presence of second order charge ordered at TCO = 28 and first order antiferromagnetic clusters at TN = 18 K. The magnetic entropy change ΔSM changes from negative around TC to positive around TCO and T N indicating the presence of normal and inverse MCEs. The influence of first and second order magnetic phase transitions on the MCE and RC are reported.

AB - In this work, the structural, magnetic, magnetocaloric effect (MCE) and refrigerant capacity (RC) properties of nanosize Sm0.7Sr 0.3Mn0.95Fe0.05O3 manganite have been investigated. Structural characterization shows that this sample has orthorhombic (Pbnm) phase with the small impurities (Mn3O 4). The sample undergoes second order paramagnetic to ferromagnetic transition at TC = 90 K followed by two types of magnetic states at T < TC, which is formed by the presence of second order charge ordered at TCO = 28 and first order antiferromagnetic clusters at TN = 18 K. The magnetic entropy change ΔSM changes from negative around TC to positive around TCO and T N indicating the presence of normal and inverse MCEs. The influence of first and second order magnetic phase transitions on the MCE and RC are reported.

KW - Magnetization

KW - Magnetocaloric effect

KW - Nanosize manganite

KW - Refrigerant capacity

UR - https://www.scopus.com/pages/publications/84900520963

U2 - 10.1016/j.jallcom.2014.04.092

DO - 10.1016/j.jallcom.2014.04.092

M3 - Article

AN - SCOPUS:84900520963

SN - 0925-8388

VL - 608

SP - 180

EP - 184

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -