Long-Time Variation of Magnetic Structure in (PrxLa1−x)Co2Si2: Coexistence of Slow and Fast Processes in Magnetic Phase Transition

2017 ◽  
Vol 86 (4) ◽  
pp. 044707
Author(s):  
Kiyoichiro Motoya ◽  
Masato Hagihala ◽  
Toru Shigeoka ◽  
Daniel Pajerowski ◽  
Masaaki Matsuda
Keyword(s):  
Phase Transition ◽  
Magnetic Structure ◽  
Magnetic Phase Transition ◽  
Time Variation ◽  
Magnetic Phase ◽  
Long Time

scholarly journals Neutron diffraction study of magnetic structure in multiferroics under pressure

2014 ◽  
Vol 70 (a1) ◽  
pp. C152-C152 ◽  
Author(s):  
Hiroyuki Kimura ◽  
Sei Fujiyama ◽  
Jin Lin ◽  
Mamoru Fukunaga ◽  
Yukio Noda ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Magnetic Structure ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Scientific Research ◽  
Neutron Diffraction Study ◽  
Electric Polarization ◽  
Exploratory Research

RMn2O5 (R = Y, Bi, rare-earth) is one of the prototypical multiferroic materials that exhibits a rich variety of magnetoelectric effects. Since the successive magnetic and ferroelectric phase transitions simultaneously take place, magnetic order has been thought to be a primary order parameter for the ferroelectricity in this system. We recently have found that in neutron diffraction study of 153EuMn2O5, magnetic phase transition is induced by applying hydrostatic pressure. As temperature decreases upon p = 1.4 GPa, the magnetic propagation wave vector changes from qM = (1/2, 0, 1/3) to (1/2, 0, 1/2), indicating that the period of magnetic unit cell as well as the magnetic structure change at the phase transition. We have also carried out the dielectric and polarization measurements under pressure and established magnetic and dielectric phase diagram as functions of temperature and pressure as shown in the figure. This study has revealed that the ferroelectric (FE1) – ferroelectric (FE2) phase transition concomitantly occurs at the magnetic phase transition, where the electric polarization is enhanced. To clarify the relevance between the ferroelectricity and the magnetic structure, we carried out single crystal magnetic structure analysis of 153EuMn2O5 upon ambient- and high-pressure. In the magnetic phase with qM = (1/2, 0, 1/3), cycloidal magnetic structure of manganese spins propagating along c-axis is realized. On the contrary in the magnetic phase with qM = (1/2, 0, 1/2), the spins arrange almost collinearly along c-axis. The result indicates that the presence of the cycloidal spin structure plays an important role for inducing (or reducing) the electric polarization in this compound. This study was supported by "KAKENHI"-programs of Scientific Research (B) (24340064), Scientific Research (A) (21244051), Challenging Exploratory Research (23654098) and of Scientific Research on Priority Areas "Novel States of Matter Induced by Frustration" (19052001).

Magnetic phase transition and magnetic structure of ground state in CsDyW O

2002 ◽  
Vol 29 (1) ◽  
pp. 9-14 ◽  
Author(s):  
V.P. Dyakonov ◽  
M.T. Borowiec ◽  
A. Jedrzejczak ◽  
M. Górska ◽  
N.A. Doroshenko ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Structure ◽  
Magnetic Phase Transition ◽  
Ground State ◽  
Magnetic Phase

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
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