Curie temperature as a critical temperature for dielectric, galvanomagnetic, and photoelectric phenomena in strongly doped Pb1−xSnxTe

A strategy to continuously tune the exchange constant J and the critical temperature Tc in the 1D coordination polymers [Co(NCS)x(NCSe)2−x(pyridine)2]n is reported. For such mixed crystals, prepared by annealing and from solution, an increase of J and Tc with increasing selenocyanate content is observed.

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A strain-induced new phase diagram and unusually high Curie temperature in manganites

Journal of Materials Chemistry C ◽

10.1039/c7tc00768j ◽

2017 ◽

Vol 5 (31) ◽

pp. 7813-7819 ◽

Cited By ~ 3

Author(s):

Yunfang Kou ◽

Tian Miao ◽

Hui Wang ◽

Lin Xie ◽

Yanmei Wang ◽

...

Keyword(s):

Phase Diagram ◽

Critical Temperature ◽

Curie Temperature ◽

Functional Materials ◽

Strongly Correlated Systems ◽

High Curie Temperature ◽

Strongly Correlated ◽

Correlated Systems ◽

Physical Phenomena ◽

New Phase

Raising the critical temperature of functional materials is a major challenge for the exploitation of many exciting physical phenomena in strongly correlated systems.

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Pressure Induced AF - F - AF Magnetic Phase Transformations in Pd Substituted FeRh Compound

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.190.299 ◽

2012 ◽

Vol 190 ◽

pp. 299-302 ◽

Cited By ~ 3

Author(s):

A.M. Chirkova ◽

A.S. Volegov ◽

D.S. Neznakhin ◽

E.A. Stepanova ◽

N.V. Baranov

Keyword(s):

Phase Transition ◽

Critical Temperature ◽

Hydrostatic Pressure ◽

Curie Temperature ◽

Phase Transformations ◽

Magnetic Phase ◽

Ambient Pressure ◽

Phase Evolution

At ambient pressure, the Fe0.49(Rh1-xPdx)0.51 alloys with the Pd concentration within 0 < x < 0.12 exhibit an antiferromagnetic (AF) state below the critical temperature Tt, while above x = 0.12 the alloys have a ferromagnetic (F) order up to the Curie temperature TC 650 K. The temperature and field dependences of the magnetization in the alloys with x = 0.08; 0.13 were investigated under hydrostatic pressure up to 10 kbar. The application of pressure of about 8.5 kbar is observed to induce the F-AF phase transition in the ferromagnetically ordered compound with x = 0.13. The AF-F-AF phase evolution was revealed with increasing pressure in the AF-ordered alloy with x = 0.08.

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The Mutual Influence of Magnetic and Chemical Ordering

MRS Proceedings ◽

10.1557/proc-19-175 ◽

1982 ◽

Vol 19 ◽

Cited By ~ 21

Author(s):

Gerhard Inden

Keyword(s):

Critical Temperature ◽

Curie Temperature ◽

Long Range ◽

Mutual Influence ◽

Magnetic Ordering ◽

Al Alloys ◽

Long Range Order ◽

Critical Temperatures ◽

Chemical Ordering ◽

Random Alloys

It can be concluded from experiments that atomic (also called “chemical”) and magnetic ordering reactions exert a mutual influence on each other. In bcc Fe-Al alloys a strong depression of the Curie temperature is observed with the onset of atomic long range order (lro) as compared to the extrapolation of Tc from the random alloys, see Fig. 1. In fcc Co-Pt alloys a depression of the critical temperature of atomic lro L12 →A1 is observed in the Co-rich alloys which are ferromagnetic, as compared to the Pt-rich counterparts which are paramagnetic, see Fig. 2. In this instance it should be noticed that this assymetry is not observed in Ni-Pt allovs where the Curie temperature is inferior to the critical temperatures of atomic lro [1].

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Critical temperature below the Curie temperature of ferroelectric ceramics PZT

Journal of Advanced Dielectrics ◽

10.1142/s2010135x21500065 ◽

2021 ◽

pp. 2150006

Author(s):

D. V. Kuzenko

Keyword(s):

Critical Temperature ◽

Curie Temperature ◽

Lead Zirconate Titanate ◽

Remanent Polarization ◽

Lead Zirconate ◽

Ferroelectric Ceramics ◽

Paraelectric Phase Transition ◽

X Ray ◽

Temperature Range ◽

Temperature Dependences

The article presents the results of research the pre-transitional features of the behavior of solid solutions based on lead zirconate-titanate. The presence of a “special” critical temperature [Formula: see text] on the temperature dependences of the permittivity [Formula: see text] and the remanent polarization [Formula: see text], preceding the temperature of the paraelectric phase transition at the Curie temperature [Formula: see text], is noted. In the temperature range [Formula: see text], the [Formula: see text] dependence obeys a power law. In the temperature range [Formula: see text], this law is not fulfilled. The results of X-ray experiments make it possible to associate this behavior with reversible disordering at [Formula: see text] of an ordered domain structure formed during the polarization of piezoelectric ceramics and with its irreversible disordering in the temperature range [Formula: see text]. This is due to the appearance of internal mechanical stresses in a polycrystalline ferroelectric due to irreversible depolarization of the samples at temperatures [Formula: see text].

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ANALYSIS OF AC TRANSPORT MEASUREMENTS ON GDSR2RUCU2O8

International Journal of Modern Physics B ◽

10.1142/s0217979203016819 ◽

2003 ◽

Vol 17 (04n06) ◽

pp. 910-915 ◽

Cited By ~ 1

Author(s):

A. VECCHIONE ◽

D. ZOLA ◽

C. NOCE ◽

G. CARAPELLA ◽

M. GOMBOS ◽

...

Keyword(s):

Critical Temperature ◽

Curie Temperature ◽

Temperature Dependence ◽

Phenomenological Model ◽

Low Frequency ◽

Onset Temperature ◽

Transport Measurements ◽

Current Voltage ◽

In Series ◽

Physical Quantities

Low frequency transport measurements have been performed on GdSr 2 RuCu 2 O 8 pellets. The current-voltage curves measured show an irreversible behavior in whole range of temperature explored. From these curve a Curie temperature TcM=133 K and a superconducting critical temperature TcS = 14 K , with an onset temperature TcO=33 K , have been deduced. A simple phenomenological model assuming a non-linear inductance in series with a resistance has been proposed to explain experimental current-voltage curves. Within this model, the temperature dependence of some physical quantities has been also investigated.

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The Influence of Pressure on the Formation of FM/AF Configurations in LSMO Films: A Monte Carlo Approach

Computation ◽

10.3390/computation8040093 ◽

2020 ◽

Vol 8 (4) ◽

pp. 93

Author(s):

Hugo Hernán Ortiz-Álvarez ◽

Francy Nelly Jiménez-García ◽

Carolina Márquez-Narváez ◽

José Dario Agudelo-Giraldo ◽

Elisabeth Restrepo-Parra

Keyword(s):

Thin Films ◽

Monte Carlo ◽

Magnetic Properties ◽

Critical Temperature ◽

Curie Temperature ◽

Monte Carlo Simulations ◽

Room Temperature ◽

Zeeman Effect ◽

Dipolar Interaction ◽

External Pressure

In this work, Monte Carlo simulations of magnetic properties of thin films, including the influence of an external pressure, are presented. These simulations were developed using a Hamiltonian composed by terms that represent the exchange interaction, dipolar interaction, Zeeman effect, monocrystalline anisotropy, and pressure influence. The term that represents the pressure influence on the magnetic properties was included, since for many applications, magnetic materials are a part of a multiferroic material together with a piezoelectric or a ferroelectric compound. Initially, the model was developed using generic parameters, in order to probe its suitable performance; after that, parameters were adjusted for simulating thin films of La0.67Sr0.33MnO3, a manganite with several technological applications because its Curie temperature is greater than room temperature. Including the pressure influence, it was observed the formation of several kind of FM/AF configurations as strip, labyrinth, and chess board forms. Furthermore, it was observed that, as the pressure increased, the critical temperature tended to decrease, and this result was in agreement with experimental reports.

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