Magnetoelectric Effect

magnetoelectric effect

[mag¦nēd·ō·i′lek·trik i‚fekt] (solid-state physics) A linear coupling between magnetization and polarization found in certain magnetic ferroelectrics, such as BaMnF₄ at low temperatures.

Magnetoelectric Effect

the appearance of magnetization J in crystals when they are placed in an electric field E (J = aE). The effect is possible only in magnetically ordered crystals (antiferromagnets, ferrimagnets, and ferromagnets).

In 1957, L. D. Landau and E. M. Lifshits first pointed out the possibility of the existence of the magnetoelectric effect. In 1959, on the basis of data concerning the magnetic symmetry of crystals, I. E. Dzialoshinskii predicted in what known antiferromagnets the magnetoelectric effect should be observed. The effect was discovered experimentally by D. N. Astrov in 1960 in the antiferromagnetic crystal Cr₂O₃. The magnitude of the magnetoelectric effect is small. The maximum value of the coefficient a for Cr₂O₃ is of the order of 2 ×10^-6. The inverse effect also exists—the appearance of electrical polarization P when a crystal is placed in a magnetic field H (P = _aH).

REFERENCES

Vonsovskii, S. V. Magnetizm. Moscow, 1971.
Borovik-Romanov, A. S. “Antiferromagnetizm.” In the collection Antiferromagnetizm i ferrity. Moscow, 1962. (Itogi nauki: Fizikomatematicheskie nauki, fasc. 4.)

A. S. BOROVIK-ROMANOV

单词	magnetoelectric effect
释义	Magnetoelectric Effect magnetoelectric effect [mag¦nēd·ō·i′lek·trik i‚fekt] (solid-state physics) A linear coupling between magnetization and polarization found in certain magnetic ferroelectrics, such as BaMnF₄ at low temperatures. Magnetoelectric Effect the appearance of magnetization J in crystals when they are placed in an electric field E (J = aE). The effect is possible only in magnetically ordered crystals (antiferromagnets, ferrimagnets, and ferromagnets). In 1957, L. D. Landau and E. M. Lifshits first pointed out the possibility of the existence of the magnetoelectric effect. In 1959, on the basis of data concerning the magnetic symmetry of crystals, I. E. Dzialoshinskii predicted in what known antiferromagnets the magnetoelectric effect should be observed. The effect was discovered experimentally by D. N. Astrov in 1960 in the antiferromagnetic crystal Cr₂O₃. The magnitude of the magnetoelectric effect is small. The maximum value of the coefficient a for Cr₂O₃ is of the order of 2 ×10^-6. The inverse effect also exists—the appearance of electrical polarization P when a crystal is placed in a magnetic field H (P = _aH). REFERENCES Vonsovskii, S. V. Magnetizm. Moscow, 1971. Borovik-Romanov, A. S. “Antiferromagnetizm.” In the collection Antiferromagnetizm i ferrity. Moscow, 1962. (Itogi nauki: Fizikomatematicheskie nauki, fasc. 4.) A. S. BOROVIK-ROMANOV
随便看	black margates black maria black marias black mark black mark against black mark against her black mark against him black mark against me black mark against one black mark against somebody black mark against someone black mark against them black mark against us black mark against you black mark beside her name black mark beside his name black mark beside my name black mark beside name black mark beside one's name black mark beside our name black mark beside our names black mark beside their name black mark beside their names black mark beside your name black-marked