Magneto-transport properties in layered manganite crystals

被引：0

作者：

Kimura, T ^{[1
]}

Tomioka, Y ^{[1
]}

Okuda, T ^{[1
]}

Kuwahara, H ^{[1
]}

Asamitsu, A ^{[1
]}

Tokura, Y ^{[1
]}

机构：

[1] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 305, Japan

来源：

SCIENCE AND TECHNOLOGY OF MAGNETIC OXIDES | 1998年 / 494卷

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anisotropic charge transport and magnetic properties have been investigated for single crystals of the layered manganite, La2-2xSr1+2xMn2O7 (0.3 less than or equal to x less than or equal to 0.5). Remarkable variations in the magnetic structure as well as in the charge-transport properties are observed with changing doping-level x. A crystal with x=0.3 behaves like a 2-dimensional ferromagnetic metal in the temperature region between similar to 90 K and similar to 270 K, and shows the interplane tunneling magnetoresistance at lower temperatures. These characteristic charge-transport properties are attributed to the interplane magnetic coupling between the adjacent MnO2 bilayers, and are strongly affected by the application of pressure as well as low magnetic fields through the change in magnetic structure. With increase of the carrier concentration toward x=0.5, the charge-ordered phase is stabilized and dominates the charge transport and magnetic properties.

引用

页码：347 / 356

页数：10