How do the magnetic and dielectric properties of ferroelectrics and ferromagnets with temperature?
Best insight from top research papers
The magnetic and dielectric properties of ferroelectrics and ferromagnets vary with temperature. In paramagnetic molecular ferroelectrics, magnetoelectric coupling occurs at room temperature, where the responses to magnetic fields and modifications of ferroelectricity have the same chemical origin . In bulk SrFe12O19, the spin moment of iron ions reorients below 50 K, leading to changes in the magnetic structure. The saturation magnetization and coercivity field show opposite tendencies with temperature . In magnetite (Fe3O4) single crystals, ac susceptibility and ac permittivity reveal similar relaxation processes at low temperatures, below the Verwey transition . In a Ni80Fe20/PbZr0.44Ti0.56O3 multiferroic heterostructure, the magnetoelectric coupling effect arises from the interfacial accumulation or depletion of spin-polarized electrons, rather than strain. The temperature dependence of magnetization and surface magnetic anisotropy is related to changes in the spin-polarized electron density due to thermal motion . In magnetic relaxor ferroelectrics, the dielectric constant exhibits a sharp increase around the magnetic phase-transition temperature, and the dielectric anomaly is attributed to the amendment of the activation energy against dipole reorientation by the spin-pair correlation via magnetoelectric coupling .
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
5 Citations | The paper does not provide information on how the magnetic and dielectric properties of ferroelectrics and ferromagnets vary with temperature. |
1 Citations | The paper does not provide information on the dielectric properties of ferroelectrics and ferromagnets with temperature. The paper focuses on the temperature dependences of magnetization and surface magnetic anisotropy at the NiFe/PZT interface. |
18 Citations | The paper discusses the temperature dependence of magnetic and electrical properties in SrFe12O19 hexaferrite. It mentions the reorientation of iron ion moments below 50 K and the existence of ferroelectricity and magnetoelectric coupling effect at low temperature. However, it does not provide a detailed explanation of the temperature dependence of magnetic and dielectric properties in general ferroelectrics and ferromagnets. |
| The paper does not provide information on how the magnetic and dielectric properties of ferroelectrics and ferromagnets change with temperature. | |
| The provided paper discusses the temperature dependence of magnetic and dielectric properties in magnetite (Fe3O4), but it does not mention ferroelectrics or ferromagnets. Therefore, it does not provide information on how the magnetic and dielectric properties of ferroelectrics and ferromagnets vary with temperature. |
Related Questions
How spin reorientation can affect the dielectric properties of a perovskite?5 answersSpin reorientation in perovskite materials can significantly impact their dielectric properties. Studies have shown that spin reorientation induces magnetodielectric coupling effects in layered perovskite magnets. Additionally, research on the PrFe0.1Cr0.9O3 system revealed spin-reversion properties during the reorientation process, influencing macroscopic magnetization. Furthermore, investigations on Ca2FeCoO5 demonstrated that spin reorientation transitions affect dielectric relaxations and conduction mechanisms, leading to changes in activation energy and conduction behavior. The interplay between spin reorientation and dielectric properties is crucial in understanding the complex behavior of perovskite materials, highlighting the intricate relationship between spin dynamics and dielectric responses in these systems.
What’s the curie temperature?4 answersThe Curie temperature is a critical temperature at which a material undergoes a phase transition from a ferromagnetic to a paramagnetic state. It is an important property for understanding the magnetic behavior of materials. The Curie temperature can be influenced by various factors such as the heating rate during thermogravimetric measurements, the structural parameters of the material, and the magnetic interactions within the material. Additionally, the Curie temperature can be affected by the presence of phonons and the feedback effect from phonons to magnetism. Understanding and predicting the Curie temperature is crucial for the design and development of ferromagnetic materials with desired magnetic properties.
How do the dielectric properties of LiMnPO4 cathode materials change with temperature?5 answersThe dielectric properties of LiMnPO4 cathode materials change with temperature. The dielectric relaxation of LiMnPO4 follows the universal law with a fractional exponent, indicating a complex dielectric behavior. The dielectric spectra of LiMnPO4 can be well fitted with an equivalent circuit capacitance parallel with a constant phase degree. The optimized microwave dielectric properties of LiMnPO4 show a low dielectric constant of 8.1 and a high quality factor of 44,224 GHz.
How are the dielectric properties of bismuth ferrite affected by temperature, pressure, and other external factors?5 answersThe dielectric properties of bismuth ferrite are influenced by temperature, pressure, and other external factors. The dielectric constant (e') of lanthanum-modified bismuth ferrite ceramics changes with increasing compacting pressure, showing a ~25% change in the low-frequency range and a ~80% change in the ultra-high frequency range. The dielectric behavior of these ceramics is stable, with low dielectric loss, making them suitable for microelectronic and spintronic applications. In the case of solid solutions of (1-x)BiFeO3 – x/2PbFe1/2Nb1/2O3 – x/2PbFe2/3W1/3O3, mechanical activation (MA) during synthesis leads to an increase in the temperature stability of the dielectric properties. The dielectric constant and dielectric loss of the BiFeO3-LiVO3 composite increase with temperature, and a temperature-dependent relaxation process is observed. The dielectric properties of bismuth ferrite nanoparticles doped with rare earth transition metal (Tb) ions are studied over a wide temperature range and show a magneto-dielectric response when an external magnetic field is applied.
Materials that exhibit ferroelectricity?5 answersFerroelectric materials that exhibit ferroelectricity include PbZrxTi1-xO3 (PZT) ceramics, (Hf,Zr)O2 and (Al,Sc)N, and BaTiO3-based, K1/2Na1/2NbO3-based, and PbMg1/3Nb2/3TiO3-PbTiO3 ceramics. The low-dimensional perovskites also show potential for ferroelectricity. Additionally, a ScxAl1−xN wurtzite phase exhibits ferroelectric properties.
Does magnetization change with temperature?0 answersThe magnetization of materials can change with temperature. In the case of variable flux permanent magnet synchronous machines (VF-PMSMs), the magnet temperature affects magnetization manipulation and maximum torque properties. Atomistic simulations on Co@Fe core-shell nanoparticles also show that magnetization is sensitive to particle size and core-shell ratio, as well as interfacial exchange energy. Studies on ferrimagnetic nanoparticles and diamagnetically substituted ferrites suggest that the temperature dependence of magnetization is related to freezing of canted magnetic structures. Additionally, a model developed using molecular field theory for the titanomagnetites series (Fe3−xTixO4) shows that the magnetization can increase initially with temperature and exhibit a maximum value, depending on the concentration of titanium.