You are looking at 1-20 of 65 entries  for:

  • All: Curie's law x
clear all

View:

Overview

Curie's law

The susceptibility (χ) of a paramagnetic substance is proportional to the thermodynamic temperature (T), i.e. χ = C/T, where C is the Curie constant. A modification of this law, the ...

Curie’s law

Curie’s law   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
89 words

...Curie’s law The susceptibility ( χ ‎) of a paramagnetic substance is proportional to the thermodynamic temperature ( T ), i.e. χ ‎= C / T , where C is the Curie constant. A modification of this law, the Curie–Weiss law , is more generally applicable. It states that χ ‎= C /( T − θ ‎), where θ ‎ is the Weiss constant, a characteristic of the material. The law was first proposed by Pierre Curie in 1895 and modified by another French physicist, Pierre-Ernest Weiss ( 1865–1940 ), in...

Curie’s law

Curie’s law   Quick reference

A Dictionary of Chemistry (8 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Chemistry
Length:
89 words

...’s law The susceptibility ( χ ‎) of a paramagnetic substance is proportional to the thermodynamic temperature ( T ), i.e. χ ‎ = C / T , where C is the Curie constant. A modification of this law, the Curie-Weiss law , is more generally applicable. It states that χ ‎ = C /( T – θ ‎), where θ ‎ is the Weiss constant, a characteristic of the material. The law was first proposed by Pierre Curie in 1895 and modified by another French physicist, Pierre-Ernest Weiss ( 1865–1940 ), in 1907...

Curie–Weiss law

Curie–Weiss law   Quick reference

A Dictionary of Geology and Earth Sciences (5 ed.)

Reference type:
Subject Reference
Current Version:
2020

...–Weiss law A law that describes the magnetic susceptibility ( X ) of a ferromagnet ( see ferromagnetism ) at temperatures above the Curie temperature . X = C /( T − θ ‎ ) where C is a constant for each material, T is the temperature in kelvins, and θ ‎ is the Curie temperature in kelvins. The law was formulated by the French physicists Pierre Curie ( 1859–1906 ) and Pierre-Ernest Weiss ( 1865–1940...

Curie's law

Curie's law  

The susceptibility (χ) of a paramagnetic substance is proportional to the thermodynamic temperature (T), i.e. χ = C/T, where C is the Curie constant. A modification of this law, the Curie-Weiss law, ...
conservation law

conservation law  

A law stating that the total magnitude of a certain physical property of a system, such as its mass, energy, or charge, remain unchanged even though there may be exchanges of that property between ...
magnetism

magnetism  

1 the property of producing, or being affected by, magnetic flux.2 the branch of physics concerned with magnets and magnetic phenomena.
Curie temperature scale

Curie temperature scale   Quick reference

A Dictionary of Weights, Measures, and Units

Reference type:
Subject Reference
Current Version:
2004

... temperature scale temperature . (also magnetic temperature ) A scale for use close to the thermodynamic null (‘absolute zero’), below the lower limit of the international temperature scale . It depends on the proportionality of the susceptibility of a paramagnetic material to the absolute temperature (Curie's law...

Curie, Marie

Curie, Marie (1867–1934)   Reference library

The New Oxford Companion to Literature in French

Reference type:
Subject Reference
Current Version:
2005
Subject:
Literature
Length:
106 words

...( 1903 ) and chemistry ( 1911 ). Her daughter and son‐in‐law, Irène and Frédéric Joliot‐Curie , were also Nobel Prize‐winning nuclear physicists. [ Michael Kelly...

paramagnetism

paramagnetism   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Engineering and Technology
Length:
702 words
Illustration(s):
4

...them and the behaviour cannot always be described by a simple equation. Nonhydrated liquids and many paramagnetic solids at ordinary temperatures and fields obey the Curie–Weiss law : where θ, the Weiss constant , can be either positive or negative. The Curie–Weiss law is only obeyed at temperatures T > |θ| and is a modification of Curie’s law arising from the mutual interactions of the ions or molecules. Certain metals, such as sodium or potassium, exhibit free-electron paramagnetism or Pauli paramagnetism in which a small positive susceptibility with...

Curie, Marie Sklodowska

Curie, Marie Sklodowska (1867–1934)   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,061 words

...There in the early 1930s her daughter Irène Joliot-Curie and son-in-law Frédéric Joliot found that bodies could be made artificially radioactive by irradiating them with neutrons. They shared the Nobel Prize in chemistry for 1935 . Marie Curie did not live to see this family triumph. She died in 1934 after suffering for some years from the results of her intimate association with radium. Marie Curie , Pierre Curie (1923; reprint 1963). Anna Hurwic , Pierre Curie (1995). Susan Quinn , Marie Curie (1996). J. L....

notaries

notaries   Reference library

The Oxford Dictionary of the Christian Church (3 rev. ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Religion
Length:
232 words

...is nominated by the judge of the provincial courts of Canterbury and York . G. Barraclough , Public Notaries and the Papal Curia: A Calendar and Study of a Formularium Notariorum Curie from the Early Years of the Fourteenth Century (1934), incl. text. C. J. Duerr , The Judicial Notary: A historical Synopsis and a Commentary (Catholic University of America Canon Law Studies, 312; 1951). C. R. Cheney , Notaries Public in England in the Thirteenth and Fourteenth Centuries (Oxford, 1972). R. Naz in DDC 6 (1957), cols. 1015–20, s.v. ‘ Notaire ’,...

Curia

Curia   Reference library

The Oxford Dictionary of the Christian Church (3 rev. ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Religion
Length:
296 words

...‘ Pastor Bonus ’ is pr. in AAS 80 (1988), 841–934; the Regulations are pr. ibid. 91 (1999), 629–99. B. Ojetti , SJ, in CE 13 (1912), 147–54, s.v. ‘ Roman Curia ’; P. Torquebiau in DDC 4 (1939), cols. 971–1008, s.v. ‘ Curie romaine ’, and on the diocesan synod see id., ibid. , cols. 961–71, s.v. ‘Curie diocésaine’. See also bibls. to Roman Congregations (also under the sep. headings) and cardinal...

ferrimagnetism

ferrimagnetism   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Engineering and Technology
Length:
262 words
Illustration(s):
1

...in materials that have a permanent molecular magnetic moment associated with unpaired electron spins. At temperatures above the Néel temperature thermal agitation causes the spins to be randomly orientated throughout the material, which becomes paramagnetic: it obeys the Curie-Weiss law approximately but is characterized by a negative Weiss constant ( see paramagnetism ). At temperatures below the Néel temperature ferrimagnetic materials behave in a similar manner to ferromagnetic materials ( see ferromagnetism ): they show spontaneous magnetization...

Vicar General

Vicar General   Reference library

The Oxford Dictionary of the Christian Church (3 rev. ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Religion
Length:
220 words

...General. For current legislation, see CIC ( 1983 ), cans. 475–81. M. A. Campagna , Il vicario generale del vescovo: Una sinossi storica e commento (Catholic University of America, Canon Law Studies, 66; Washington, DC, 1931). E. Fournier , Les Origines du vicaire général (1922; also in id. , L'Origine du vicaire général et des autres membres de la Curie diocésaine , 1940, pp. 283–400). ...

antiferromagnetism

antiferromagnetism   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Engineering and Technology
Length:
598 words
Illustration(s):
8

...and B z and is independent of the temperature. The overall magnetization of the specimen is 2 M x , where M x is the component of each sublattice in the direction of B ; it can be shown that and that where μ 0 is the permeability of free space and C the Curie constant from the Curie–Weiss law for the material. The susceptibility χ א is thus equal to C 2 T N , i.e. it is not dependent on temperature below the Néel temperature ( Fig. b ). (c) Effect of external flux, B , applied perpendicular to magnetic moments (d) Variation of susceptibility with...

symmetry and symmetry breaking

symmetry and symmetry breaking   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,357 words

...its mirror-image. This violation, predicted by Tsung Dao Lee and Chen Ning Yang in 1956 , was detected soon afterward experimentally by Chien Shiung Wu and her colleagues. The law governing the weak nuclear interaction breaks the symmetry, and the Curie principle can only be saved by including the law within the cause. During the latter half of the twentieth century, spontaneous symmetry breaking also became important in biology. Brian Goodwin described one such application in How the Leopard Changed Its Spots ( 1994 ). All organisms start off as...

radioactivity

radioactivity   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,730 words

...from the work of Rutherford's groups in Montreal and Manchester; Marie Curie's laboratory in Paris; Otto Hahn and Lise Meitner 's work in Berlin; and other investigators, including Bertram Borden Boltwood at Yale University in New Haven. They differentiated natural decay series beginning with uranium (238), actinium (227) or uranium (235), and thorium (232). In 1913 Soddy , Alexander Russell , and Kasimir Fajans independently developed a generalized radioactive displacement law. In 1911 Soddy had noted that loss of an alpha particle produced a...

ferromagnetism

ferromagnetism   Quick reference

A Dictionary of Electronics and Electrical Engineering (5 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Engineering and Technology
Length:
1,174 words
Illustration(s):
3

...solids in which the magnetic properties change abruptly at a certain characteristic temperature known as the Curie point . Below the Curie point the solid exhibits ferromagnetic properties. Above this temperature the thermal energy of the atoms is sufficient to produce magnetic properties typical of paramagnetism : the susceptibility obeys the Curie-Weiss law approximately, the value of the Weiss constant being close to that of the Curie point and a few degrees higher. The chief ferromagnetic elements are iron, cobalt, and nickel; there are also many...

magnetism

magnetism   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
772 words
Illustration(s):
1

...conducting electrons. 3. In ferromagnetic substances, within a certain temperature range, there are net atomic magnetic moments, which line up in such a way that magnetization persists after the removal of the applied field. Below a certain temperature, called the Curie point (or Curie temperature) an increasing magnetic field applied to a ferromagnetic substance will cause increasing magnetization to a high value, called the saturation magnetization . This is because a ferromagnetic substance consists of small (1−0.1 mm across) magnetized regions...

conservation laws

conservation laws   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,805 words

...decay through measurements by Marie Sklodowska Curie , Ernest Rutherford , and others and the mass-energy law ( E = mc 2 ) of relativity. Conservation of energy was an integral part of Niels Bohr 's theory of atomic structure ( 1913 ). As the problems of his quantized atoms mounted in the early 1920s, however, he limited conservation of energy to the average of all the interactions of atoms with the electromagnetic field, and freed individual interactions from the necessity of obeying the first law of thermodynamics ( 1924 ). This lèse majesté ...

View: