On the Curie temperature dependency of the magnetocaloric effect

2012 ◽  
Vol 100 (24) ◽  
pp. 242407 ◽  
Author(s):  
J. H. Belo ◽  
J. S. Amaral ◽  
A. M. Pereira ◽  
V. S. Amaral ◽  
J. P. Araújo
Keyword(s):  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Dependency

Publisher’s Note: “On the Curie temperature dependency of the magnetocaloric effect” [Appl. Phys. Lett. 100, 242407 (2012)]

2012 ◽  
Vol 101 (7) ◽  
pp. 079904 ◽  
Author(s):  
J. H. Belo ◽  
J. S. Amaral ◽  
A. M. Pereira ◽  
V. S. Amaral ◽  
J. P. Araújo
Keyword(s):  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Dependency

scholarly journals Теплоемкость и магнитокалорический эффект соединений LaFe-=SUB=-11.2-x-=/SUB=-Mn-=SUB=-x-=/SUB=-Co-=SUB=-0.7-=/SUB=-Si-=SUB=-1.1-=/SUB=- (x=0, 0.1, 0.2, 0.3)

2020 ◽  
Vol 62 (5) ◽  
pp. 752
Author(s):  
Н.З. Абдулкадирова ◽  
А.М. Алиев ◽  
А.Г. Гамзатов ◽  
P. Gebara
Keyword(s):  
Heat Capacity ◽  
Magnetic Fields ◽  
Curie Temperature ◽  
Specific Heat ◽  
Magnetocaloric Effect ◽  
Intermetallic Compounds ◽  
Indirect Method ◽  
Direct Method ◽  
Capacity Data ◽  
Value Changes

The specific heat and magnetocaloric effect of the LaFe11.2-хMnxCo0.7Si1.1 intermetallic compounds (x = 0.1, 0.2, 0.3) were measured in the temperature range 80–300 K and in magnetic fields up to 8 T. The magnetocaloric effect (MCE) was estimated using two methods: direct method in cyclic magnetic fields, as well as an indirect method from heat capacity data. It was shown that an increase in the concentration of Mn atoms leads to a shift in the Curie temperature of the TC toward lower temperatures, while the FM value changes slightly.

Experimental Study of Magnetocaloric Effect in Ni-Fe-Mn-Ga and Ni-Co-Mn-Ga Heusler Alloys

2013 ◽  
Vol 738-739 ◽  
pp. 456-460 ◽  
Author(s):  
Rafael Fayzullin ◽  
Vasiliy D. Buchelnikov ◽  
Sergey Taskaev ◽  
Mikhail Drobosyuk ◽  
Vladimir V. Khovaylo
Keyword(s):  
Martensitic Transformation ◽  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Increase ◽  
Direct Method ◽  
Heusler Alloys ◽  
Iron Concentration ◽  
Magnetostructural Transition ◽  
Phase Transition Temperatures ◽  
Magnetic Field Change

In this work we experimentally studied the MCE in the Heusler alloys Ni2.19-xFexMn0.81Ga (x = 0.01, 0.02, 0.03, 0.04) and Ni2.16-xCoxMn0.84Ga (x = 0.03, 0.06, 0.09). Magnetocaloric effect was measured by the direct method using the installation from the company AMT&C. The temperature dependencies of ∆Tad for the magnetic field change ∆H = 2 T were measured. The phase transition temperatures were determined from temperature dependencies of low field magnetization measured by original setup using Hall effect. Studies have shown that replacement of the Ni atoms with the iron atoms slightly reduces the temperature magnetostructural transition for x = 0.01,0.02, and starting with x = 0.03, magnetic and structural transitions occur separately and a further increase in iron concentration leads to the Curie temperature increase, while the temperature martensitic transformation decreases. When replacing the Ni atoms with the Co atoms of the martensitic transformation temperature and Curie temperature increase.

The Magnetic Phase Transitions and Magnetocaloric Effect in the Ho(Co1-XAlx)2 and Tb(Co1-XAlx)2 Compounds

2010 ◽  
Vol 168-169 ◽  
pp. 119-121 ◽  
Author(s):  
S.A. Nikitin ◽  
G.A. Tskhadadze ◽  
I.A. Ovchenkova ◽  
D.A. Zhukova ◽  
T.I. Ivanova
Keyword(s):  
Phase Transitions ◽  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Magnetic Phase ◽  
Magnetic Ordering ◽  
Magnetic Phase Transitions ◽  
Al Content ◽  
Direct Measurements ◽  
Magnetic Ordering Temperature ◽  
Ferrimagnetic Structure

Direct measurements of the magnetocaloric effect (MCE) and magnetization have been conducted for the R(Co1-xAlx)2 (R = Tb, Ho) compounds. It was found that the small substitutions of Co by nonmagnetic Al lead to an increase both of the magnetic ordering temperature and the value of MCE. The following increase in Al content decreases the Curie temperature and the value of MCE. The analyses of the MCE effect is conducted considering the ferrimagnetic structure and the itinerant nature of these compounds.

scholarly journals Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window

2013 ◽  
Vol 102 (12) ◽  
pp. 122405 ◽  
Author(s):  
E. K. Liu ◽  
H. G. Zhang ◽  
G. Z. Xu ◽  
X. M. Zhang ◽  
R. S. Ma ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Window ◽  
Giant Magnetocaloric Effect

scholarly journals CURIE TEMPERATURE AND MAGNETOCALORIC EFFECT OF POLYCRYSTALLINE La0.8-xCa0.2MnO3

2001 ◽  
Vol 50 (2) ◽  
pp. 319
Author(s):  
CHEN WEI ◽  
ZHONG WEI ◽  
PAN CHENG ◽  
CHANG HONG ◽  
DU YOU-WEI
Keyword(s):  
Curie Temperature ◽  
Magnetocaloric Effect
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