Effect of pressure and magnetic field on the resistance of the self-doped manganese perovskite La0.91Mn0.95O3

被引：28

作者：

Markovich, V ^{[1
]}

Rozenberg, E

Gorodetsky, G

Revzin, B

Pelleg, J

Felner, I

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

[3] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.62.14186

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of hydrostatic pressure P up to 9 kbar and applied magnetic fields H up to 15 kOe on the transport properties of La0.91Mn0.95O3 at temperatures T=77-300 K is reported. At ambient pressure and zero magnetic field the transition to a ferromagnetic phase takes place at T(c)approximate to 252 K whereas a maximum in resistivity rho is observed at T-r = 262 K. It is shown that the maximum in the derivative d rho (T,P)/dT occurs at the ferromagnetic transition temperature T-c. The observed pressure coefficient d In Tc/dP approximate to0.0048 kbar(-1) is found to be consistent with Mn+4 concentration of about 40%. The observed behavior of the resistivity rho (T) at applied magnetic field is analyzed by the mean field theory. It is shown that the maximum of d rho (T)/dT at applied magnetic field H shifts according to H-2/3.

引用

页码：14186 / 14190

页数：5

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