Double magnetic entropy change peaks and high refrigerant capacity in Gd1-xHoxNi compounds in the melt-spun form

In this paper, we report on the structure, magnetic properties and magnetocaloric effect in NaZn13-type LaFe11.1Co0.8Si1.1Bxalloys close to room temperature. The stable NaZn13cubic structure phase (space group isFm-3c) can easily obtained by annealing at 1080 °C for 225 hours. The maximal values of magnetic entropy change for LaFe11.1Co0.8Si1.1Bx(x=0.2, 0.25) were found to be 5.3 and 5.9 J/kg K at Curie temperature for a magnetic field change in 0-1.5 T, respectively. The calculated refrigerant capacity for a field change in 0–1.5 T is about 147 and 107 J/kg K, for LaFe11.1Co0.8Si1.1B0.2and LaFe11.1Co0.8Si1.1B0.25respectively, which is as larger as those of Gd(99.3%) alloy

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Magnetocaloric Properties of Rapidly Solidified Ni51.1Mn31.2In17.7 Heusler Alloy Ribbons

MRS Proceedings ◽

10.1557/proc-1200-g07-05 ◽

2009 ◽

Vol 1200 ◽

Author(s):

Jose Sánchez Llamazares ◽

Blanca Hernando ◽

Víctor Prida ◽

Carlos García ◽

Caroline Ross

Keyword(s):

Melt Spinning ◽

Magnetic Entropy Change ◽

Magnetic Transition ◽

Entropy Change ◽

Single Step ◽

Magnetic Entropy ◽

Refrigerant Capacity ◽

Magnetocaloric Properties ◽

Room Temperature Magnetic Refrigeration ◽

Rapidly Solidified

AbstractMagnetic entropy change and refrigerant capacity have been determined for a field change of 20 kOe around the second-order magnetic transition of austenite in as-quenched Ni51.1Mn31.2In17.7 alloy ribbons produced by melt spinning technique. Samples crystallize in a single-phase austenite with the highly ordered L21-type crystal structure and a Curie temperature of 275 K. The material shows a maximum magnetic entropy change of ΔSMmax= - 1.7 Jkg-1K-1, an useful working temperature range of 78 K (δTFWHM) and a refrigerant capacity of RC=132 Jkg-1 (RC= │ΔSMmax│ x δTFWHM). The considerable RC value obtained together with the fabrication via a single-step process make austenitic Ni-Mn-In ribbons of potential interest as magnetic refrigerants for room temperature magnetic refrigeration.

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Effects of annealing on the magnetic entropy change and exchange bias behavior in melt-spun Ni–Mn–In ribbons

Scripta Materialia ◽

10.1016/j.scriptamat.2010.03.067 ◽

2010 ◽

Vol 63 (2) ◽

pp. 250-253 ◽

Cited By ~ 49

Author(s):

X.G. Zhao ◽

C.C. Hsieh ◽

J.H. Lai ◽

X.J. Cheng ◽

W.C. Chang ◽

...

Keyword(s):

Exchange Bias ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy ◽

Melt Spun

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Magnetic entropy change and transport properties in Ni45Co5Mn36.6In13.4 melt-spun ribbons

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2012.09.054 ◽

2013 ◽

Vol 549 ◽

pp. 170-174 ◽

Cited By ~ 3

Author(s):

L. Chen ◽

F.X. Hu ◽

J. Wang ◽

L.F. Bao ◽

X.Q. Zheng ◽

...

Keyword(s):

Transport Properties ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy ◽

Melt Spun ◽

Melt Spun Ribbons

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MAGNETOCALORIC EFFECT IN THE INTERMETALLIC COMPOUND Gd3Ni8Al

Modern Physics Letters B ◽

10.1142/s0217984912501679 ◽

2012 ◽

Vol 26 (25) ◽

pp. 1250167 ◽

Cited By ~ 1

Author(s):

M. X. WANG ◽

H. FU ◽

Q. ZHENG ◽

J. TANG

Keyword(s):

Intermetallic Compound ◽

Magnetocaloric Effect ◽

Single Phase ◽

Magnetic Entropy Change ◽

Magnetic Measurements ◽

Entropy Change ◽

Magnetic Entropy ◽

X Ray Diffraction ◽

X Ray ◽

Refrigerant Capacity

The magnetic properties and magnetocaloric effect of the polycrystalline Gd 3 Ni 8 Al intermetallic compound are studied in this paper. Powder X-ray diffraction shows that the alloy is CeNi 3-type single-phase structure. The magnetic measurements indicate that the compound is ferromagnetic and undergoes a second-order phase transition at 62 K. The maximum of magnetic entropy change reaches 11 J/kg K for the field change from 0 to 50 kOe and the refrigerant capacity of the titled compound is found to be 4.8×102 J/kg.

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Structure and magnetic entropy change of melt-spun LaFe11.57Si1.43 ribbons

Journal of Applied Physics ◽

10.1063/1.1844605 ◽

2005 ◽

Vol 97 (3) ◽

pp. 036102 ◽

Cited By ~ 58

Author(s):

A. Yan ◽

K.-H. Müller ◽

O. Gutfleisch

Keyword(s):

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy ◽

Melt Spun

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Field Dependence of the Refrigerant Capacity for La0.6Ca0.4MnO3 Manganite

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.154.163 ◽

2009 ◽

Vol 154 ◽

pp. 163-168 ◽

Cited By ~ 1

Author(s):

R.A. Szymczak ◽

Aleksandra Kolano-Burian ◽

Roman Kolano ◽

R. Puzniak ◽

V.P. Dyakonov ◽

...

Keyword(s):

Magnetic Field ◽

Curie Temperature ◽

Statistical Model ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Relative Cooling Power ◽

Cooling Power ◽

Magnetic Entropy ◽

Refrigerant Capacity ◽

Jahn Teller

The magnetocaloric effect in La0.6Ca0.4MnO3 manganite has been investigated. The isothermal magnetization versus applied magnetic field at various temperatures in the vicinity of Curie temperature was measured, and the temperature dependence of magnetic entropy change was determined using Maxwell’s relation. This value is comparable to that in Gd. Nevertheless, the relative cooling power of La0.6Ca0.4MnO3 was shown to be considerably lower than that of Gd. The experimental results have been analyzed in frames of a phenomenological statistical model. This model considers explicitly Jahn-Teller interactions and allows prediction of the field dependences of the magnetic entropy change and the relative cooling power.

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