Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in LaFe13-xSix compounds

Jun Shen; Qiao Yan Dong; Yang Xian Li; Ji Rong Sun

doi:10.1016/j.jallcom.2007.09.064

Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in LaFe_13-xSi_x compounds

Jun Shen^*, Qiao Yan Dong, Yang Xian Li, Ji Rong Sun

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in the cubic NaZn₁₃-type compound LaFe_11.2Si_1.8 has been experimentally investigated. Replacing 30 at.% La with Pr leads to a decrease of Curie temperature from 216 to 203 K, and drives the magnetic transition from second-order to first-order. As a result, magnetic entropy change, under a field change of 0-5 T, increases from 13.7 to 19.4 J/kg K. Substitution of Co for Fe in La₀₇Pr_0.3Fe_11.2Si_1.8 can adjust T_C to around room temperature. A magnetic entropy change of 9.3 J/kg K at T_C = 290 K for a field change from 0 to 5 T is obtained in La₀₇Pr_0.3Fe_10.4Co_0.8Si_1.8. A reversible variation of magnetization with temperature and magnetic field is observed in the present compound, which is highly desired by the magnetic refrigeration application.

Original language	English
Pages (from-to)	115-118
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	458
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2007.09.064
Publication status	Published - 30 Jun 2008
Externally published	Yes

Keywords

LaFeSi compounds
Magnetic entropy changes
Magnetic properties

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10.1016/j.jallcom.2007.09.064

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title = "Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in LaFe13-xSix compounds",

abstract = "Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in the cubic NaZn13-type compound LaFe11.2Si1.8 has been experimentally investigated. Replacing 30 at.% La with Pr leads to a decrease of Curie temperature from 216 to 203 K, and drives the magnetic transition from second-order to first-order. As a result, magnetic entropy change, under a field change of 0-5 T, increases from 13.7 to 19.4 J/kg K. Substitution of Co for Fe in La07Pr0.3Fe11.2Si1.8 can adjust TC to around room temperature. A magnetic entropy change of 9.3 J/kg K at TC = 290 K for a field change from 0 to 5 T is obtained in La07Pr0.3Fe10.4Co0.8Si1.8. A reversible variation of magnetization with temperature and magnetic field is observed in the present compound, which is highly desired by the magnetic refrigeration application.",

keywords = "LaFeSi compounds, Magnetic entropy changes, Magnetic properties",

author = "Jun Shen and Dong, {Qiao Yan} and Li, {Yang Xian} and Sun, {Ji Rong}",

year = "2008",

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day = "30",

doi = "10.1016/j.jallcom.2007.09.064",

language = "English",

volume = "458",

pages = "115--118",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "1-2",

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TY - JOUR

T1 - Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in LaFe13-xSix compounds

AU - Shen, Jun

AU - Dong, Qiao Yan

AU - Li, Yang Xian

AU - Sun, Ji Rong

PY - 2008/6/30

Y1 - 2008/6/30

N2 - Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in the cubic NaZn13-type compound LaFe11.2Si1.8 has been experimentally investigated. Replacing 30 at.% La with Pr leads to a decrease of Curie temperature from 216 to 203 K, and drives the magnetic transition from second-order to first-order. As a result, magnetic entropy change, under a field change of 0-5 T, increases from 13.7 to 19.4 J/kg K. Substitution of Co for Fe in La07Pr0.3Fe11.2Si1.8 can adjust TC to around room temperature. A magnetic entropy change of 9.3 J/kg K at TC = 290 K for a field change from 0 to 5 T is obtained in La07Pr0.3Fe10.4Co0.8Si1.8. A reversible variation of magnetization with temperature and magnetic field is observed in the present compound, which is highly desired by the magnetic refrigeration application.

AB - Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in the cubic NaZn13-type compound LaFe11.2Si1.8 has been experimentally investigated. Replacing 30 at.% La with Pr leads to a decrease of Curie temperature from 216 to 203 K, and drives the magnetic transition from second-order to first-order. As a result, magnetic entropy change, under a field change of 0-5 T, increases from 13.7 to 19.4 J/kg K. Substitution of Co for Fe in La07Pr0.3Fe11.2Si1.8 can adjust TC to around room temperature. A magnetic entropy change of 9.3 J/kg K at TC = 290 K for a field change from 0 to 5 T is obtained in La07Pr0.3Fe10.4Co0.8Si1.8. A reversible variation of magnetization with temperature and magnetic field is observed in the present compound, which is highly desired by the magnetic refrigeration application.

KW - LaFeSi compounds

KW - Magnetic entropy changes

KW - Magnetic properties

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DO - 10.1016/j.jallcom.2007.09.064

M3 - Article

AN - SCOPUS:42949121966

SN - 0925-8388

VL - 458

SP - 115

EP - 118

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Effect of Pr and Co substitution on magnetic properties and magnetic entropy changes in LaFe_13-xSi_x compounds

Abstract

Keywords

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