Magnetic materials
... their atomic orbits, induced when experiencing an external magnetic field. The substance is then diamagnetic, with a negative susceptibility independent of both field strength and temperature. From the previous problem one can understand the strong variation of M(T) in a paramagnetic material. This ...
... their atomic orbits, induced when experiencing an external magnetic field. The substance is then diamagnetic, with a negative susceptibility independent of both field strength and temperature. From the previous problem one can understand the strong variation of M(T) in a paramagnetic material. This ...
Prediction of half-metallic properties in TlCrS2 and TlCrSe2 based
... that this compounds may be valuable for spintronic application. As is known, integer value of the total magnetic moment (in Bohr magneton) is a necessary but not sufficient condition for the existence of half-metallic state. For a 100% spin polarization it is necessary to have the energy gap in the ...
... that this compounds may be valuable for spintronic application. As is known, integer value of the total magnetic moment (in Bohr magneton) is a necessary but not sufficient condition for the existence of half-metallic state. For a 100% spin polarization it is necessary to have the energy gap in the ...
PHYSICAL PROPERTIES OF SULFIDE MATERIALS
... the validity of the atomic energy levels calculated for the free atom. One of the basic concepts here is the idea of exchange interactions and covalent bonds. The central concept of the covalent bond is that a lower energy can be achieved by sharing electrons between neighboring atoms in directional ...
... the validity of the atomic energy levels calculated for the free atom. One of the basic concepts here is the idea of exchange interactions and covalent bonds. The central concept of the covalent bond is that a lower energy can be achieved by sharing electrons between neighboring atoms in directional ...
Astrophysics by Jonathan Chan
... Heated cathode releases electrons and produces a fast-moving stream of electrons. The electron gun produces a narrow beam of electrons - the electrodes (cathode and anode) in the gun accelerate the electrons. IN TV’s 3 electron guns are used to strike red, blue and green filters. The deflect ...
... Heated cathode releases electrons and produces a fast-moving stream of electrons. The electron gun produces a narrow beam of electrons - the electrodes (cathode and anode) in the gun accelerate the electrons. IN TV’s 3 electron guns are used to strike red, blue and green filters. The deflect ...
Presentation - Dagotto Group
... In their pure form, their conductivity is determined by thermal energy ...
... In their pure form, their conductivity is determined by thermal energy ...
Ideas to Implementation by Jonathan Chan
... In Thomson’s experiment to measure the charge/mass ratio of an electron, cathode rays were passed through two narrow slits to make a thin parallel beam aimed at the centre of a fluorescent screen. Electrodes were placed to create a uniform electric field that exerted a downward force on the beam. El ...
... In Thomson’s experiment to measure the charge/mass ratio of an electron, cathode rays were passed through two narrow slits to make a thin parallel beam aimed at the centre of a fluorescent screen. Electrodes were placed to create a uniform electric field that exerted a downward force on the beam. El ...
Quantum Dimer Models on the Square Lattice
... In collaboration with D. Banerjee, M. Bogli, C. Hofmann, P. Wilder, and U.-J. Wiese (PRB 90, 245143 (2014) and arXiv:1511.00881). Some of the figures and content are from Debasish, Philippe, Pascal, and online sources, in particular the preprint arXiv:0809.3051. ...
... In collaboration with D. Banerjee, M. Bogli, C. Hofmann, P. Wilder, and U.-J. Wiese (PRB 90, 245143 (2014) and arXiv:1511.00881). Some of the figures and content are from Debasish, Philippe, Pascal, and online sources, in particular the preprint arXiv:0809.3051. ...
chapter19_2007
... more temperature more obstacles for electron movement higher resistivity ...
... more temperature more obstacles for electron movement higher resistivity ...
Inorganic Materials Chemistry Lecture Notes
... The percentage of intrinsic point defects in most ionic compounds is small but they can have a significant effect on electrical, magnetic and optical properties. The smallest ∆H (∆HS or ∆HF) will determine if Shottky or Frenkel defects dominate. Point defects (extrinsic) Introducing different ions i ...
... The percentage of intrinsic point defects in most ionic compounds is small but they can have a significant effect on electrical, magnetic and optical properties. The smallest ∆H (∆HS or ∆HF) will determine if Shottky or Frenkel defects dominate. Point defects (extrinsic) Introducing different ions i ...
High-temperature superconductivity
High-temperature superconductors (abbreviated high-Tc or HTS) are materials that behave as superconductors at unusually high temperatures. The first high-Tc superconductor was discovered in 1986 by IBM researchers Georg Bednorz and K. Alex Müller, who were awarded the 1987 Nobel Prize in Physics ""for their important break-through in the discovery of superconductivity in ceramic materials"".Whereas ""ordinary"" or metallic superconductors usually have transition temperatures (temperatures below which they superconduct) below 30 K (−243.2 °C), and must be cooled using liquid helium in order to achieve superconductivity, HTS have been observed with transition temperatures as high as 138 K (−135 °C), and can be cooled to superconductivity using liquid nitrogen. Until 2008, only certain compounds of copper and oxygen (so-called ""cuprates"") were believed to have HTS properties, and the term high-temperature superconductor was used interchangeably with cuprate superconductor for compounds such as bismuth strontium calcium copper oxide (BSCCO) and yttrium barium copper oxide (YBCO). However, several iron-based compounds (the iron pnictides) are now known to be superconducting at high temperatures.For an explanation about Tc (the critical temperature for superconductivity), see Superconductivity § Superconducting phase transition and the second bullet item of BCS theory § Successes of the BCS theory.