________________Table des Matières_______________
... use of this family of compounds in applications has several disadvantages (low Curie temperature, low sensitivity to the applied field, large resistivity..), the importance of manganites is more clear as a model system for several fundamental studies due to the strong coupling between the magnetic, ...
... use of this family of compounds in applications has several disadvantages (low Curie temperature, low sensitivity to the applied field, large resistivity..), the importance of manganites is more clear as a model system for several fundamental studies due to the strong coupling between the magnetic, ...
Magnetic quenching of time-reversed light in photorefractive diluted magnetic semiconductors
... materials, for which CdMnTe has been most thoroughly characterized, make them an ideal material system for the study of magneto-photorefractive effects. The effect of magnetic fields on photorefractive phenomena in diluted magnetic semiconductors has been studied previously in the case of two-wave m ...
... materials, for which CdMnTe has been most thoroughly characterized, make them an ideal material system for the study of magneto-photorefractive effects. The effect of magnetic fields on photorefractive phenomena in diluted magnetic semiconductors has been studied previously in the case of two-wave m ...
Synthesis and Ferroelectric Properties of KNO3 films
... All solids consist of charged particles (nuclei and electrons) but overall they are neutral. For most solids, there is also no net separation of positive and negative charges; there is no net dipole moment. Even if a solid is composed of molecules with permanent dipole moments (e.g ice), the molecul ...
... All solids consist of charged particles (nuclei and electrons) but overall they are neutral. For most solids, there is also no net separation of positive and negative charges; there is no net dipole moment. Even if a solid is composed of molecules with permanent dipole moments (e.g ice), the molecul ...
File
... • Colloidal system are the ones in which one of three states (solid, liquid and gas) is finely dispersed in another. • Colloids were named first in the early 19th century by the Father of Physical Chemistry, Thomas Graham (1805-1869). In 1920's and 1930's, the importance of colloids to industrial pr ...
... • Colloidal system are the ones in which one of three states (solid, liquid and gas) is finely dispersed in another. • Colloids were named first in the early 19th century by the Father of Physical Chemistry, Thomas Graham (1805-1869). In 1920's and 1930's, the importance of colloids to industrial pr ...
Double resonance spectroscopy on the cesium atomic clock transition
... Application of the method was first reported in 1952 [1] after it had been proposed in 1949. The principles behind double resonance spectroscopy applied to the ground state of cesium shall now briefly be explained. We have a small cell containing a dilute gas of cesium-133 at room temperature. To be ...
... Application of the method was first reported in 1952 [1] after it had been proposed in 1949. The principles behind double resonance spectroscopy applied to the ground state of cesium shall now briefly be explained. We have a small cell containing a dilute gas of cesium-133 at room temperature. To be ...
Local magnetic properties of antiferromagnetic FeBr_{2}
... attracted special attention. The AF magnetic order in these two compounds can be described as an antiferromagnetic stacking of ferromagnetic (FM) layers. They show a firstorder metamagnetic phase transition at low temperature in external magnetic field parallel to the c-axis. Above a certain multicr ...
... attracted special attention. The AF magnetic order in these two compounds can be described as an antiferromagnetic stacking of ferromagnetic (FM) layers. They show a firstorder metamagnetic phase transition at low temperature in external magnetic field parallel to the c-axis. Above a certain multicr ...
Phys. Rev. Applied 2, 024002
... contribution to the temperature uncertainty. Therefore, the temperature can be determined much more precisely by measuring the g factors for this dot using two-color spectroscopy [12]. For a general application of this thermometry method in alternate QD systems, it is desirable to eliminate this OSP ...
... contribution to the temperature uncertainty. Therefore, the temperature can be determined much more precisely by measuring the g factors for this dot using two-color spectroscopy [12]. For a general application of this thermometry method in alternate QD systems, it is desirable to eliminate this OSP ...
d and f block elements
... Ans) Interstitial compounds are those which are formed when small atoms like K,C, or N are trapped inside the crystal lattices of metals. They are usually non stoichiometric and are neither typically ionic non covalent The transition metals have voids between atoms in their crystal lattice. Therefor ...
... Ans) Interstitial compounds are those which are formed when small atoms like K,C, or N are trapped inside the crystal lattices of metals. They are usually non stoichiometric and are neither typically ionic non covalent The transition metals have voids between atoms in their crystal lattice. Therefor ...
BaTiO 3
... such a way as to lead to zero net polarization, the pyroelectric and piezoelectric effects of individual domains will cancel and such material is neither pyroelectric nor piezoelectric. Polycrystalline ferroelectric materials may be brought into a polar state by applying a strong electric field (10– ...
... such a way as to lead to zero net polarization, the pyroelectric and piezoelectric effects of individual domains will cancel and such material is neither pyroelectric nor piezoelectric. Polycrystalline ferroelectric materials may be brought into a polar state by applying a strong electric field (10– ...
Basic Concepts for Simple and Complex Liquids
... properties on the macroscopic scale; moreover one can transform the substance from one state (or phase) to another, simply by varying thermodynamic conditions, like temperature or pressure. In other words, a collection of N molecules, where N is typically of the order of Avogadro’s number NA , will ...
... properties on the macroscopic scale; moreover one can transform the substance from one state (or phase) to another, simply by varying thermodynamic conditions, like temperature or pressure. In other words, a collection of N molecules, where N is typically of the order of Avogadro’s number NA , will ...
Modeling the Neutral-Ionic Transition with Correlated Electrons
... The singlet-triplet gap is zero for Γ ≤ Γm , and the infinite chain is paramagnetic with finite magnetic susceptibility at 0 K. Quantum phase transitions related to the opening of a singlet-triplet gap have been extensively treated theoretically in spin-1/2 chains with frustrated exchange interactio ...
... The singlet-triplet gap is zero for Γ ≤ Γm , and the infinite chain is paramagnetic with finite magnetic susceptibility at 0 K. Quantum phase transitions related to the opening of a singlet-triplet gap have been extensively treated theoretically in spin-1/2 chains with frustrated exchange interactio ...
Lecture 18: Antennas and interference
... For example, consider again the case with two antennas spaced d = 2 apart in the y direction, but now have them be broadcasting exactly out of phase δ = π. The radiation pattern from ...
... For example, consider again the case with two antennas spaced d = 2 apart in the y direction, but now have them be broadcasting exactly out of phase δ = π. The radiation pattern from ...
Magnetic order from molecular oxygen anions Riyadi, Syarif
... measurements [41]. NaO2 transforms to an ordered-pyrite structure below 223 K (space group: P a3̄), in which the superoxide orientations are ordered along the [111] directions of the cubic unit cell, and further transforms to the orthorhombic marcasite structure below 196 K [42]. Long-range antiferr ...
... measurements [41]. NaO2 transforms to an ordered-pyrite structure below 223 K (space group: P a3̄), in which the superoxide orientations are ordered along the [111] directions of the cubic unit cell, and further transforms to the orthorhombic marcasite structure below 196 K [42]. Long-range antiferr ...
Limit on the Present Temporal Variation of the Fine Structure Constant
... changes of particle properties took place in the early evolution of the universe and it is conceivable that remnants of these changes are still observable in later epochs. Variations of the constants have been searched for in various contexts [2,3]. Sommerfeld’s fine structure constant is presentl ...
... changes of particle properties took place in the early evolution of the universe and it is conceivable that remnants of these changes are still observable in later epochs. Variations of the constants have been searched for in various contexts [2,3]. Sommerfeld’s fine structure constant is presentl ...
K - UCSB Physics
... 1, 2, 1),8–15 hexagonal insulators (Na/Li)2 IrO3 ,16–21 a large family of pyrochlores, R2 Ir2 O7 ,2 some spinel-related structures.25,26 Close to iridates in the periodic table are several osmium such as NaOsO3 27 and Cd2 Os2 O7 ,28 which experimentally display MITs. Apart from thes ...
... 1, 2, 1),8–15 hexagonal insulators (Na/Li)2 IrO3 ,16–21 a large family of pyrochlores, R2 Ir2 O7 ,2 some spinel-related structures.25,26 Close to iridates in the periodic table are several osmium such as NaOsO3 27 and Cd2 Os2 O7 ,28 which experimentally display MITs. Apart from thes ...
ABSTRACT Phase Transitions of High-Temperature Superconductors Su Li
... 4.3.2 Dynamical Critical Exponent z in Field . . . . . . . . . . . . . 109 4.4 Experimental Results of YBCO Crystals . . . . . . . . . . . . . . . . 111 ...
... 4.3.2 Dynamical Critical Exponent z in Field . . . . . . . . . . . . . 109 4.4 Experimental Results of YBCO Crystals . . . . . . . . . . . . . . . . 111 ...
Magnetism of PrFeAsO parent compound for iron-based
... Mössbauer spectra have been collected in standard transmission geometry for 14.41-keV transition in 57Fe by using commercial 57Co(Rh) source kept under ambient pressure and at room temperature. Absorber was made in the powder form mixing 44 mg of PrFeAsO with the B4C carrier. Absorber thickness amo ...
... Mössbauer spectra have been collected in standard transmission geometry for 14.41-keV transition in 57Fe by using commercial 57Co(Rh) source kept under ambient pressure and at room temperature. Absorber was made in the powder form mixing 44 mg of PrFeAsO with the B4C carrier. Absorber thickness amo ...
Chapter 10: Superconductivity
... 10.2 Triplet Superconductors . . . . . . . . . . . . . . . . . . . . . . . . . ...
... 10.2 Triplet Superconductors . . . . . . . . . . . . . . . . . . . . . . . . . ...
Lecture 6
... • Because ac current tends to flow towards the surface of a conductor, the resistance of a line at 60 Hz is slightly higher than at dc. • Resistivity and hence line resistance increase as conductor temperature increases (changes is about 8% between 25C and 50C) • Because ACSR conductors are strand ...
... • Because ac current tends to flow towards the surface of a conductor, the resistance of a line at 60 Hz is slightly higher than at dc. • Resistivity and hence line resistance increase as conductor temperature increases (changes is about 8% between 25C and 50C) • Because ACSR conductors are strand ...
UNIVERSIDAD DE CANTABRIA
... presented along this chapter. Firstly, the increasing interest of nanomaterials regarding both fundamental studies and applications is outlined. Secondly, the determination of the energy levels of an ion in a crystal, and the transitions among these levels, responsible for the RE and TM ions optical ...
... presented along this chapter. Firstly, the increasing interest of nanomaterials regarding both fundamental studies and applications is outlined. Secondly, the determination of the energy levels of an ion in a crystal, and the transitions among these levels, responsible for the RE and TM ions optical ...
Design and Analysis of Switched Reluctance Motors
... The torque vs. time variation for different materials is given in Fig. 15. The worst solution is obtained with cast iron. The material has very low saturation value and high eddy current loss. The best solution in material sense is obtained with M800. This material is the steepest one compared to th ...
... The torque vs. time variation for different materials is given in Fig. 15. The worst solution is obtained with cast iron. The material has very low saturation value and high eddy current loss. The best solution in material sense is obtained with M800. This material is the steepest one compared to th ...
Anomalies in mid-high-temperature linear thermal expansion
... is the absolute temperature. KA equals to gas pressure, while KF depends on the density and internal structure of the foam. As for closed-cell aluminum foam, KA (around 0.1 MPa) is far less than KF (around 1,000 MPa). Therefore, the second term on the right side of Eq. (6) can be ignored, leading to ...
... is the absolute temperature. KA equals to gas pressure, while KF depends on the density and internal structure of the foam. As for closed-cell aluminum foam, KA (around 0.1 MPa) is far less than KF (around 1,000 MPa). Therefore, the second term on the right side of Eq. (6) can be ignored, leading to ...
Sample pages - International Union of Crystallography
... 1.2.1. Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...
... 1.2.1. Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...
Magnetic and orbital ordering of RuO2 planes in RuSr2„Eu,Gd
... coexists with magnetic order, which was first believed to be FM,9–12 since the magnetization shows a rapid increase with magnetic field for fields below 5 T, and the inverse magnetic susceptibility at high temperatures yields a positive Curie constant ⌰ = 100± 3 K.12 However, neutron diffraction exp ...
... coexists with magnetic order, which was first believed to be FM,9–12 since the magnetization shows a rapid increase with magnetic field for fields below 5 T, and the inverse magnetic susceptibility at high temperatures yields a positive Curie constant ⌰ = 100± 3 K.12 However, neutron diffraction exp ...
Quasi-one-dimensional spin nematic states and their excitations Oleg Starykh, University of Utah
... figure. Integrating Cm/T between 1.8 K and 60 K, we find a value of 4.1 J/mol K which is about 30 % smaller than the total magnetic entropy (Rln2) for S = 1/2. The discrepancy is most likely due to crudeness of the estimation of the lattice contribution particularly at high temperature. To be noted ...
... figure. Integrating Cm/T between 1.8 K and 60 K, we find a value of 4.1 J/mol K which is about 30 % smaller than the total magnetic entropy (Rln2) for S = 1/2. The discrepancy is most likely due to crudeness of the estimation of the lattice contribution particularly at high temperature. To be noted ...
Phase transition
A phase transition is the transformation of a thermodynamic system from one phase or state of matter to another one by heat transfer. The term is most commonly used to describe transitions between solid, liquid and gaseous states of matter, and, in rare cases, plasma. A phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium certain properties of the medium change, often discontinuously, as a result of the change of some external condition, such as temperature, pressure, or others. For example, a liquid may become gas upon heating to the boiling point, resulting in an abrupt change in volume. The measurement of the external conditions at which the transformation occurs is termed the phase transition. Phase transitions are common in nature and used today in many technologies.