Magnetic and magnetocaloric properties in La0.7Ca0.3−xNaxMnO3 exhibiting first-order and second-order magnetic phase transitions

2016 ◽  
Vol 676 ◽  
pp. 305-312 ◽  
Author(s):  
T.A. Ho ◽  
N.T. Dang ◽  
The-Long Phan ◽  
D.S. Yang ◽  
B.W. Lee ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Second Order ◽  
Magnetic Phase Transitions ◽  
First Order ◽  
Magnetocaloric Properties

Magnetic Phase Transitions and Magnetocaloric Properties of Gd5Si0.4In3.6 Compound

2013 ◽  
Vol 320 ◽  
pp. 67-71
Author(s):  
Chao Jing ◽  
X.L. Wang ◽  
D.H. Yu ◽  
Y.J. Yang ◽  
B.J. Kang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Entropy Change ◽  
Magnetic Phase ◽  
Entropy Change ◽  
Ferromagnetic State ◽  
Order Transition ◽  
Magnetic Phase Transitions ◽  
Magnetocaloric Properties ◽  
Second Order Transition ◽  
First Order Transition

The magnetic phase transitions and magnetocaloric properties of Gd5Si0.4In3.6 compound have been investigated. Magnetothermal measurements performed at different conditions reveal that the sample undergoes two magnetic phase transitions. One is a second-order transition from paramagnetic to ferromagnetic state at about 197 K, the other is a first-order transition when the temperature is reduced to 75 K. The magnetocaloric effect around Curie temperature (TC) was calculated in terms of isothermal magnetic entropy change by using Maxwells equation,which remains over a quite wide temperature span of 70 K between the temperature region from160 to 240 K, and thus makes this material attractive for magnetic refrigerator applications.

MAGNETIC PHASE TRANSITIONS IN Ce(Fe1–xCox)2 SYSTEM

1993 ◽  
Vol 07 (01n03) ◽  
pp. 822-825 ◽  
Author(s):  
NAUSHAD ALI ◽  
XIANFENG ZHANG
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Ac Susceptibility ◽  
Magnetic Phase Diagram ◽  
Ferromagnetic State ◽  
Magnetic Phase Transitions ◽  
Itinerant Electron ◽  
Electron Systems ◽  
First Order ◽  
First Order Transition

Re-entrant magnetic phase transitions in Ce(Fe1–xMx)2 systems (where M=Al, Ru, Co, etc.) are being investigated by various research groups. It has been observed that the system goes from a paramagnetic to ferromagnetic state followed by an almost complete loss of magnetization as the temperature is lowered. We have done systematic experimental measurements of magnetization, ac susceptibility, electrical resistivity, and thermal expansion on the Ce(Fe1–xCox)2 system. It is found that as the temperature is decreased, the system goes from para- to ferro- to antiferro-magnetic phase. The ferro- to antiferro-magnetic phase transition is a first order transition. Our experimental results are consistent with the magnetic phase diagram predictions by Moriya and Usami's theory of strongly interacting itinerant electron systems.

Three first order magnetic phase transitions in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

2010 ◽  
Vol 505 (2) ◽  
pp. L38-L42 ◽  
Author(s):  
R. Zeng ◽  
J.L. Wang ◽  
L. Lu ◽  
W.X. Li ◽  
S.J. Campbell ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
First Order

Change in the Resistivity of bcc and bct FeRh Alloys at First-Order Magnetic Phase Transitions

1995 ◽  
Vol 64 (10) ◽  
pp. 3978-3985 ◽  
Author(s):  
Shinji Yuasa ◽  
Takashi Akiyama ◽  
Hideki Miyajima ◽  
Yoshichika Otani
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
First Order

First-order magnetic phase transitions in thin films

JETP Letters ◽  
2006 ◽  
Vol 83 (2) ◽  
pp. 79-82
Author(s):  
J. -P. Ader ◽  
A. I. Buzdin
Keyword(s):  
Thin Films ◽  
Phase Transitions ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
First Order
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