scholarly journals AC measurement of heat capacity and magnetocaloric effect for pulsed magnetic fields

2010 ◽  
Vol 81 (10) ◽  
pp. 104902 ◽  
Author(s):  
Yoshimitsu Kohama ◽  
Christophe Marcenat ◽  
Thierry Klein ◽  
Marcelo Jaime
Keyword(s):  
Heat Capacity ◽  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Pulsed Magnetic Fields ◽  
Ac Measurement

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.

Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T

2020 ◽  
Vol 62 (1) ◽  
pp. 160-163 ◽  
Author(s):  
A. P. Kamantsev ◽  
A. A. Amirov ◽  
Yu. S. Koshkid’ko ◽  
C. Salazar Mejía ◽  
A. V. Mashirov ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Pulsed Magnetic Fields

scholarly journals MAGNETOCALORIC EFFECT AND HEAT CAPACITY OF MAGNETIC FLUIDS

2020 ◽  
Vol 63 (5) ◽  
pp. 12-18
Author(s):  
Viktor V. Korolev ◽  
Anna G. Ramazanova ◽  
Olga V. Balmasova ◽  
Matvey S. Gruzdev
Keyword(s):  
Magnetic Field ◽  
Heat Capacity ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Magnetocaloric Effect ◽  
Specific Heat Capacity ◽  
Magnetic Fluids ◽  
Zero Magnetic Field ◽  
Extreme Character ◽  
Temperature Dependences

The magnetic fluids based on magnetite nanoparticles were synthesized using mixed surfactants (oleic acid/alkenyl succinic anhydride) dispersed in different carrier media (polyethylsiloxane and dialkyldiphenyl). The physicochemical properties of magnetic fluids (density, viscosity, saturation magnetization, magnetic phase concentration, magnetic core size) were determined. Magnetic fluids are stable in a wide temperature range. All the samples of the magnetic fluids exhibit typical superparamagnetic behavior. The magnetocaloric effect and the specific heat capacity of the magnetic fluids were first direct determined at 288–350 K in a magnetic field of 0–1.0 T. The field dependences of the magnetocaloric effect have a classic linear form. The temperature dependences of the magnetocaloric effect of magnetic fluids in magnetic fields have an extreme character. Thermodynamic parameters of magnetic fluids (magnetization namely enthalpy/entropy change) were determined. The specific heat capacity of magnetic fluid samples in a zero magnetic field was obtained at different temperatures (at 278–350 K) on a differential scanning calorimeter and on the original microcalorimeter. The temperature dependences of the heat capacity of magnetic fluids in magnetic fields have an extreme character. It was established that the difference in heat capacity values obtained in and without the magnetic field is within the experimental error. The extreme character of the heat capacity is reflected in the magnetocaloric effect temperature dependences.

scholarly journals Direct Measurement of the Magnetocaloric Effect inLa(Fe,Si,Co)13Compounds in Pulsed Magnetic Fields

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
M. Ghorbani Zavareh ◽  
Y. Skourski ◽  
K. P. Skokov ◽  
D. Yu. Karpenkov ◽  
L. Zvyagina ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Direct Measurement ◽  
Pulsed Magnetic Fields

Measurement of magnetocaloric effect in pulsed magnetic fields with the help of infrared fiber optical temperature sensor

2017 ◽  
Vol 440 ◽  
pp. 70-73 ◽  
Author(s):  
Alexander P. Kamantsev ◽  
Victor V. Koledov ◽  
Alexey V. Mashirov ◽  
Vladimir G. Shavrov ◽  
N.H. Yen ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Temperature Sensor ◽  
Pulsed Magnetic Fields ◽  
Fiber Optical ◽  
Optical Temperature Sensor

Magnetic method of magnetocaloric effect determination in high pulsed magnetic fields

1997 ◽  
Vol 170 (1-2) ◽  
pp. 223-227 ◽  
Author(s):  
R.Z. Levitin ◽  
V.V. Snegirev ◽  
A.V. Kopylov ◽  
A.S. Lagutin ◽  
A. Gerber
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Magnetic Method ◽  
Pulsed Magnetic Fields

scholarly journals Direct measurements of the magnetocaloric effect in pulsed magnetic fields: The example of the Heusler alloy Ni50Mn35In15

2015 ◽  
Vol 106 (7) ◽  
pp. 071904 ◽  
Author(s):  
M. Ghorbani Zavareh ◽  
C. Salazar Mejía ◽  
A. K. Nayak ◽  
Y. Skourski ◽  
J. Wosnitza ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetocaloric Effect ◽  
Heusler Alloy ◽  
Pulsed Magnetic Fields ◽  
Direct Measurements
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