Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)13-H compounds

被引：67

作者：

Basso, Vittorio ^{[1
]}

Kuepferling, Michaela ^{[1
]}

Curcio, Carmen ^{[1
]}

Bennati, Cecilia ^{[1
,2
]}

Barzca, Alexander ^{[3
]}

Katter, Matthias ^{[3
]}

Bratko, Milan ^{[4
]}

Lovell, Edmund ^{[4
]}

Turcaud, Jeremy ^{[4
]}

Cohen, Lesley F. ^{[4
]}

机构：

[1] Ist Nazl Ric Metrol, I-10135 Turin, Italy

[2] Politecn Torino, DISAT, I-10129 Turin, Italy

[3] Vacuumschmelze GmbH & Co KG, D-63450 Hanau, Germany

[4] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

MAGNETOCALORIC PROPERTIES; MN; HYSTERESIS; LA(FE;

D O I：

10.1063/1.4928086

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we present the results of an experimental investigation on the magnetocaloric properties of hydrogenated La(Fe-Mn-Si)(13)-H with Mn substituting Fe to finely tune the transition temperature. We measured the specific heat under magnetic field c(p)(H,T) and the magnetic field induced isothermal entropy change Delta s(H, T) of a series of compounds by direct Peltier calorimetry. Results show that increasing Mn from 0.06 to 0.46 reduces the transition temperature from 339 K to 270K whilst the total entropy change due to a 1.51 field is depressed from 18.7 J kg(-1)K(-1) to 10.2 J kg(-1)K(-1) and the thermal hysteresis similarly is reduced from 1.5 K to zero. In the paper, we interpret the results in terms of a magnetic phase transition changing from the first to the second order with increasing Mn content, and we discuss the value of the results for magnetic cooling applications. (C) 2015 AIP Publishing LLC.

引用

页数：6

共 21 条

[1] Stability and Magnetocaloric Properties of Sintered La(Fe, Mn, Si)13Hz Alloys
Barcza, A.
Katter, M.
Zellmann, V.
Russek, S.
Jacobs, S.
Zimm, C.
[J]. IEEE TRANSACTIONS ON MAGNETICS, 2011, 47 (10) : 3391 - 3394
[2] Basso V., 2007, REFR SCI TECHN P IIR, P263
[3] Basso V., 2014, P 6 IIF IIR INT C MA
[4] Entropy change at magnetic phase transitions of the first order and second order
Basso, Vittorio
Sasso, Carlo P.
Kuepferling, Michaela
[J]. INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2014, 37 : 257 - 265
[5] Hysteresis and magnetocaloric effect at the magnetostructural phase transition of Ni-Mn-Ga and Ni-Mn-Co-Sn Heusler alloys
Basso, Vittorio
Sasso, Carlo P.
Skokov, Konstantin P.
Gutfleisch, Oliver
Khovaylo, Vladimir V.
[J]. PHYSICAL REVIEW B, 2012, 85 (01)
[6] A Peltier cells differential calorimeter with kinetic correction for the measurement of cp(H, T) and Δs(H, T) of magnetocaloric materials
Basso, Vittorio
Sasso, Carlo Paolo
Kuepferling, Michaela
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2010, 81 (11)
[7] Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides -: art. no. 104416
Fujita, A
Fujieda, S
Hasegawa, Y
Fukamichi, K
[J]. PHYSICAL REVIEW B, 2003, 67 (10)
[8] Magnetocaloric properties of La(Fe, Co, Si) 13 bulk material prepared by powder metallurgy
Katter, Matthias
Zellmann, Volker
Reppel, Georg Werner
Uestuener, Kaan
[J]. IEEE Transactions on Magnetics, 2008, 44 (11 PART 2) : 3044 - 3047
[9] Kitanovski A., 2015, Green Energy and Technology
[10] Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application
Krautz, Maria
Skokov, Konstantin
Gottschall, Tino
Teixeira, Cristiano S.
Waske, Anja
Liu, Jian
Schultz, Ludwig
Gutfleisch, Oliver
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 598 : 27 - 32

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