Definition of point Сurie and sizes of exchange interaction of rocks

Urusova B.I., Salpagarova Z.A.

Karachaevo-Circassian state university of U.D.Aliev, Urusova50@mail.ru

Point Сurie of rocks is the physical characteristic of a material and coincides with point Сurie of those ferromagnetic materials which contain in them. Value of point Сurie of rocks gives the chance to estimate to some extent likelihood structure of the ferromagnetic minerals containing in them.

We investigate rocks (andesito - basalt), the rivers of B.Zelenchuk taken from a right bank, Karachaevo-Circassian republic (КCR), number of a borehole 16/1061 and age Pz+Kz. For definition of point Кюри - the rock Hardware (andesito - basalt) measurements of magnetisation I depending on temperature have been spent.

On fig. 1 temperature dependence of magnetisation I(T) is resulted

Fig. 1. Temperature dependence of magnetisation I(T) of rock (andesito - basalt)

Rock (andesito - basalt). It is visible, that at increase of temperature the curve of temperature dependence of magnetisation falls, apparently, streamlining of the magnetic moments under the influence of energy of thermal fluctuations kT collapses. At enough heats revolting action of thermal fluctuations starts to overcome the forces keeping system of the elementary magnetic moments in the ordered condition.

The course of the curve characterising reduction of magnetisation with rise in temperature, becomes more and more abrupt while, at last, at some critical temperature Т=1004К, the curve of temperature dependence of magnetisation disappears. It is critical temperature, is point Сurie Т_с=1004К.

Further used value of point Curie - Т_с=1004К for an estimation of size of exchange interactions and an exchange field:

Eexch=gSμ_BHexch≈kT_c (1)

Where Eexch - energy of exchange interaction;

g - The factor of spectroscopic splitting;

S - Spin the moment;

μ_B - magneton the Pine forest;

Hexch - An exchange field;

k - Constant Boltzmann.

Calculations have shown, that g=2; S=1; T_c=1004K, Hexch=5·10⁶Э. Though at T_c=1004K magnetisation disappears, exchange forces do not disappear; apparently, value Eexch is not enough to keep the spin moments in the ordered condition.

Thus, analyzing results of research, we come to conclusion, that likelihood structure of mountain ore (andesito - basalt) - iron.