Magnetic-Instability-Induced Giant Magnetoelectric Coupling
... induced by hole/electron doping, temperature, magnetic field, pressure, and/or lattice strain. For the first time we here show that spin-state transitions can also be induced by an electric field in the case of magnetoelectric materials that display magnetic instabilities. Materials with pure ionic ...
... induced by hole/electron doping, temperature, magnetic field, pressure, and/or lattice strain. For the first time we here show that spin-state transitions can also be induced by an electric field in the case of magnetoelectric materials that display magnetic instabilities. Materials with pure ionic ...
Unveiling the quantum critical point of an Ising chain
... Quantum phase transitions occur at zero temperature upon variation of some nonthermal control parameters. The Ising chain in a transverse field is a textbook model undergoing such a transition, from ferromagnetic to paramagnetic state. This model can be exactly solved by using a Jordan-Wigner transf ...
... Quantum phase transitions occur at zero temperature upon variation of some nonthermal control parameters. The Ising chain in a transverse field is a textbook model undergoing such a transition, from ferromagnetic to paramagnetic state. This model can be exactly solved by using a Jordan-Wigner transf ...
Exchange Interactions in a Dinuclear Manganese (II) Complex with
... ferromagnetic, the minimum at 60 K appears due to a delicate balance between J1 and J2 even at = 0 (see the inset in Figure 2). The low-temperature ferromagnetic state of the cluster is a consequence of a special spin geometry of the cluster that cancels the total spins of cpo in the ground state ...
... ferromagnetic, the minimum at 60 K appears due to a delicate balance between J1 and J2 even at = 0 (see the inset in Figure 2). The low-temperature ferromagnetic state of the cluster is a consequence of a special spin geometry of the cluster that cancels the total spins of cpo in the ground state ...
The magnetic properties of the high pressure
... symmetry it is unlikely to have any signifi- ture of FeP04-I is only 25 K, so that the cant influence on the electric field gradient. weak additional absorption in the center of Consequently, one of the principal axes xyz the spectrum at 43 K can be attributed to a must lie along the crystallographi ...
... symmetry it is unlikely to have any signifi- ture of FeP04-I is only 25 K, so that the cant influence on the electric field gradient. weak additional absorption in the center of Consequently, one of the principal axes xyz the spectrum at 43 K can be attributed to a must lie along the crystallographi ...
Magnetism
... external field, no dipoles exist; in the presence of a field, dipoles are induced that are aligned opposite to the field direction. (b) Atomic dipole configuration with and without an external magnetic field for a paramagnetic material ...
... external field, no dipoles exist; in the presence of a field, dipoles are induced that are aligned opposite to the field direction. (b) Atomic dipole configuration with and without an external magnetic field for a paramagnetic material ...
Document
... induced by a steady magnetic field. The current flow is termed Josephson current, and the penetration ("tunneling") of the insulator by the Cooper pairs is known as the Josephson effect. Named after the British physicist Brian D. Josephson, who predicted its existence in 1962. ...
... induced by a steady magnetic field. The current flow is termed Josephson current, and the penetration ("tunneling") of the insulator by the Cooper pairs is known as the Josephson effect. Named after the British physicist Brian D. Josephson, who predicted its existence in 1962. ...
Magnetism f08
... energy is wasted in hysteresis loop. Soft magnetic materials are desirable in transformer cores and other applications where residual magnetization is undesirable Defects, such as nonmagnetic phases and voids restrict easy movement of domain walls and are to be avoided in soft magnetic materials. So ...
... energy is wasted in hysteresis loop. Soft magnetic materials are desirable in transformer cores and other applications where residual magnetization is undesirable Defects, such as nonmagnetic phases and voids restrict easy movement of domain walls and are to be avoided in soft magnetic materials. So ...
BASICS OF DIELECTRIC MATERIALS
... • Strain sensors inside pressure gages. • Piezoelectric materials also make inexpensive but fantastically accurate "clocks". For example, – the element keeping track of time inside a quartz watch is literally a small piece of vibrating quartz. Its vibration period is stable to more than one part per ...
... • Strain sensors inside pressure gages. • Piezoelectric materials also make inexpensive but fantastically accurate "clocks". For example, – the element keeping track of time inside a quartz watch is literally a small piece of vibrating quartz. Its vibration period is stable to more than one part per ...
(111) direction : molecular field parameters
... shows no abrupt changes. This result may be explained by the saturation of the Tb + 3 moments when at low temperature only some of the states of the rare-earth are populated. The garnet in question is magnetically saturated in moderate fields at temperatures near 0 K and as such it belongs to the ca ...
... shows no abrupt changes. This result may be explained by the saturation of the Tb + 3 moments when at low temperature only some of the states of the rare-earth are populated. The garnet in question is magnetically saturated in moderate fields at temperatures near 0 K and as such it belongs to the ca ...
Intra-European Fellowships (IEF)
... inhomogeneous, forming clumps of very different shape and sizes. Indeed, the CDW order extends from many small puddles like the small ice crystals, to very large one (like an iceberg). We discovered that the distribution of the puddles size and puddle density follows a power-law distribution over mo ...
... inhomogeneous, forming clumps of very different shape and sizes. Indeed, the CDW order extends from many small puddles like the small ice crystals, to very large one (like an iceberg). We discovered that the distribution of the puddles size and puddle density follows a power-law distribution over mo ...
chapter-iv experimental details
... The techniques were employed for the measurement of Curie temperature in the investigations. The Curie temperature (Tc) is nothing but the transition temperature at which the ferromagnetic state of the material changes to paramagnetic state. This principle was employed to determine the Curie tempera ...
... The techniques were employed for the measurement of Curie temperature in the investigations. The Curie temperature (Tc) is nothing but the transition temperature at which the ferromagnetic state of the material changes to paramagnetic state. This principle was employed to determine the Curie tempera ...
1 Basics of magnetic materials Definitions in SI
... Other energetic considerations • FM depends strongly on the crystal structure of the materials in question. • Particularly important in insulators, where exchange interaction between local moments is not mediated by conduction electrons. • Result: strong coupling between deformation and magnetizati ...
... Other energetic considerations • FM depends strongly on the crystal structure of the materials in question. • Particularly important in insulators, where exchange interaction between local moments is not mediated by conduction electrons. • Result: strong coupling between deformation and magnetizati ...
Lecture 5 - Course Notes
... • Without an applied field, adjacent magnetic moments (electron spins associated with magnetic atoms) align anti-parallel to each other. • Adjacent magnetic moments are equal in magnitude and opposite therefore there is no overall magnetisation. • This occurs below a particular temperature, called N ...
... • Without an applied field, adjacent magnetic moments (electron spins associated with magnetic atoms) align anti-parallel to each other. • Adjacent magnetic moments are equal in magnitude and opposite therefore there is no overall magnetisation. • This occurs below a particular temperature, called N ...
Magnetostriction vs. Magnetoelastic Effects
... Magnetostriction (from Wikipedia) Magnetostriction is a property of ferromagnetic materials that causes them to change their shape when subjected to a magnetic field. The effect was first identified in 1842 by James Joule when observing a sample of nickel. This effect can cause losses due to frictio ...
... Magnetostriction (from Wikipedia) Magnetostriction is a property of ferromagnetic materials that causes them to change their shape when subjected to a magnetic field. The effect was first identified in 1842 by James Joule when observing a sample of nickel. This effect can cause losses due to frictio ...
1 CHAPTER 12 PROPERTIES OF MAGNETIC MATERIALS 12.1
... It may be worthwhile to remind ourselves of the ways in which we have defined the magnetic fields B and H. To define B, we noted that an electric current situated in a magnetic field experiences a force at right angles to the current, the magnitude and direction of this force depending on the direct ...
... It may be worthwhile to remind ourselves of the ways in which we have defined the magnetic fields B and H. To define B, we noted that an electric current situated in a magnetic field experiences a force at right angles to the current, the magnitude and direction of this force depending on the direct ...
1 CHAPTER 12 PROPERTIES OF MAGNETIC MATERIALS 12.1
... It may be worthwhile to remind ourselves of the ways in which we have defined the magnetic fields B and H. To define B, we noted that an electric current situated in a magnetic field experiences a force at right angles to the current, the magnitude and direction of this force depending on the direct ...
... It may be worthwhile to remind ourselves of the ways in which we have defined the magnetic fields B and H. To define B, we noted that an electric current situated in a magnetic field experiences a force at right angles to the current, the magnitude and direction of this force depending on the direct ...
Properties of magnetic materials
... orbiting of the electrons around the nucleus. A diamagnet is expelled from a strong applied magnetic field, compare the levitating frog experiment. ...
... orbiting of the electrons around the nucleus. A diamagnet is expelled from a strong applied magnetic field, compare the levitating frog experiment. ...
Dielectric loss
... •In some crystals, the application of an external stress induces a net dipole moment, such crystals are known as Piezoelectric crystals. •A stress applied to the crystal will change the electric polarization. Similarly, an electric field E applied to the crystal will cause the crystal to become stra ...
... •In some crystals, the application of an external stress induces a net dipole moment, such crystals are known as Piezoelectric crystals. •A stress applied to the crystal will change the electric polarization. Similarly, an electric field E applied to the crystal will cause the crystal to become stra ...
Ultrathin Films and Some Cross Effect
... U= - (1/2)(M1xH1x+M1yH1y+ M2xH2x+M2yH2y) = - (M1M2/4πμor123) (2cosθ1cosθ2 - sinθ1sinθ2) If the two dipoles have the same magnetic moment, M1=M2=M and if they are always parallel to each other, that is θ1=θ2=θ, the above expression because ...
... U= - (1/2)(M1xH1x+M1yH1y+ M2xH2x+M2yH2y) = - (M1M2/4πμor123) (2cosθ1cosθ2 - sinθ1sinθ2) If the two dipoles have the same magnetic moment, M1=M2=M and if they are always parallel to each other, that is θ1=θ2=θ, the above expression because ...
chapter11 Paramagnetism and Diamagnetism
... He assumed that paramagnetic materials have molecules or atoms with the same non-zero net magnetic moment µ. In the absence of magnetic field, these atomic moments point at random and cancel one another. M=0 When a field is applied, each atomic moment tends to align with the field direction; if no o ...
... He assumed that paramagnetic materials have molecules or atoms with the same non-zero net magnetic moment µ. In the absence of magnetic field, these atomic moments point at random and cancel one another. M=0 When a field is applied, each atomic moment tends to align with the field direction; if no o ...
Magnetism and Matter
... Diamagnetism is small and negative. Paramagnetism is small and positive Diamagnetism is a property of all materials and opposes applied magnetic fields, but is very weak. Paramagnetism, when present, is stronger than diamagnetism and produces magnetization in the direction of the applied field, ...
... Diamagnetism is small and negative. Paramagnetism is small and positive Diamagnetism is a property of all materials and opposes applied magnetic fields, but is very weak. Paramagnetism, when present, is stronger than diamagnetism and produces magnetization in the direction of the applied field, ...
Presentation - Dagotto Group
... the cation sites because they are bound more tightly than the defects However this reduces the total doping concentration, so ideal concentrations depend on the functionality of equipment ...
... the cation sites because they are bound more tightly than the defects However this reduces the total doping concentration, so ideal concentrations depend on the functionality of equipment ...
Curie temperature
Curie point, also called Curie Temperature, temperature at which certain magnetic materials undergo a sharp change in their magnetic properties. In the case of rocks and minerals, remanent magnetism appears below the Curie point—about 570° C (1,060° F) for the common magnetic mineral magnetite. This temperature is named for the French physicist Pierre Curie, who in 1895 discovered the laws that relate some magnetic properties to change in temperatureIn physics and materials science, the Curie temperature (Tc), or Curie point, is the temperature where a material's permanent magnetism changes to induced magnetism. The force of magnetism is determined by magnetic moments.The Curie temperature is the critical point where a material's intrinsic magnetic moments change direction. Magnetic moments are permanent dipole moments within the atom which originate from electrons' angular momentum and spin.Materials have different structures of intrinsic magnetic moments that depend on temperature. At a material's Curie Temperature those intrinsic magnetic moments change direction.Permanent magnetism is caused by the alignment of magnetic moments and induced magnetism is created when disordered magnetic moments are forced to align in an applied magnetic field.For example, the ordered magnetic moments (ferromagnetic, Figure 1) change and become disordered (paramagnetic, Figure 2) at the Curie Temperature.Higher temperatures make magnets weaker as spontaneous magnetism only occurs below the Curie Temperature. Magnetic susceptibility only occurs above the Curie Temperature and can be calculated from the Curie-Weiss Law which is derived from Curie's Law.In analogy to ferromagnetic and paramagnetic materials, the Curie temperature can also be used to describe the temperature where a material's spontaneous electric polarisation changes to induced electric polarisation or the reverse upon reduction of the temperature below the Curie temperature.The Curie temperature is named after Pierre Curie who showed that magnetism was lost at a critical temperature.