The temperature dependence of some thermodynamical quantities of ferromagnetic alloys in the region of magnetic phase transition

1978 ◽  
Vol 28 (6) ◽  
pp. 663-674 ◽  
Author(s):  
Z. Chvoj
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Ferromagnetic Alloys

scholarly journals Hidden non-Fermi liquid behavior caused by magnetic phase transition in Ni-doped Ba-122 pnictides

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Seokbae Lee ◽  
Ki-Young Choi ◽  
Eilho Jung ◽  
Seulki Roh ◽  
Soohyeon Shin ◽  
...  
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Magnetic Phase Transition ◽  
Fermi Liquid ◽  
Magnetic Phase ◽  
Linear Temperature Dependence ◽  
Scattering Rate ◽  
Underdoped Sample ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

Abstract We studied two BaFe2−x Ni x As2 (Ni-doped Ba-122) single crystals at two different doping levels (underdoped and optimally doped) using an optical spectroscopic technique. The underdoped sample shows a magnetic phase transition around 80 K. We analyze the data with a Drude-Lorentz model with two Drude components (D1 and D2). It is known that the narrow D1 component originates from electron carriers in the electron-pockets and the broad D2 mode is from hole carriers in the hole-pockets. While the plasma frequencies of both Drude components and the static scattering rate of the broad D2 component show negligible temperature dependencies, the static scattering rate of the D1 mode shows strong temperature dependence for the both samples. We observed a hidden quasi-linear temperature dependence in the scattering rate of the D1 mode above and below the magnetic transition temperature while in the optimally doped sample the scattering rate shows a more quadratic temperature dependence. The hidden non-Fermi liquid behavior in the underdoped sample seems to be related to the magnetic phase of the material.

ELASTIC EFFECTS IN SOME FERROMAGNETIC URANIUM PNICTIDES

1993 ◽  
Vol 07 (01n03) ◽  
pp. 212-215 ◽  
Author(s):  
D. KACZOROWSKI ◽  
D. FINSTERBUSCH ◽  
B. LÜTHI
Keyword(s):  
Phase Transition ◽  
Temperature Dependence ◽  
Ultrasonic Velocity ◽  
Elastic Constants ◽  
Magnetic Phase Transition ◽  
Sound Propagation ◽  
Magnetic Phase ◽  
Velocity Measurements ◽  
Single Crystalline

The results of ultrasonic velocity measurements on single-crystalline U 3 P 4, UCuP 2 and UCuAs 2 ferromagnets are presented. For cubic U 3 P 4 the temperature dependence of all three non-zero elastic constants c 11, c 12 and c 44 has been derived. All of them exhibit a strong softening In the vicinity of T C but particularly large effect (~13%) is observed in the case of the shear constant c 12. For tetragonal UCuP 2 and UCuAs 2 the sound propagation along the c-axis has only been studied. In UCuP 2 both the c 33 and c 44 constants show a strong softening near the magnetic phase transition (~ 7%). Much smaller anomalies in elastic constants at T C and an unusual temperature dependence of c 44 In the ferromagnetic region are observed for the arsenide.

scholarly journals Study of physical properties of a ferrimagnetic spinel Cu1.5Mn1.5O4: spin dynamics, magnetocaloric effect and critical behavior

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25664-25676
Author(s):  
Abir Hadded ◽  
Jalel Massoudi ◽  
Sirine Gharbi ◽  
Essebti Dhahri ◽  
A. Tozri ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Physical Properties ◽  
Magnetocaloric Effect ◽  
Phase Transition Temperature ◽  
Magnetic Phase Transition ◽  
Critical Behavior ◽  
Magnetic Phase ◽  
Spin Dynamics ◽  
Critical Behaviour

The present work reports a detailed study of the spin dynamics, magnetocaloric effect and critical behaviour near the magnetic phase transition temperature, of a ferrimagnetic spinel Cu1.5Mn1.5O4.

First-order magnetic phase transition in layered Sr3YCo4O10.5 + δ-type cobaltites

JETP Letters ◽  
2012 ◽  
Vol 94 (12) ◽  
pp. 849-852 ◽  
Author(s):  
I. O. Troyanchuk ◽  
M. V. Bushinsky ◽  
V. M. Dobryanskii ◽  
N. V. Pushkarev
Keyword(s):  
Phase Transition ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
First Order ◽  
Order Magnetic Phase Transition

Effect of pressure on the magnetic phase transition in α′-NaV2O5

1999 ◽  
Vol 113 (4) ◽  
pp. 217-220 ◽  
Author(s):  
R.K Kremer ◽  
I Loa ◽  
F.S Razavi ◽  
K Syassen
Keyword(s):  
Phase Transition ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Effect Of Pressure
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