INTRINSIC GIANT MAGNETORESISTANCE OF MIXED-VALENCE LA-A-MN OXIDE (A=CA,SR,BA) (INVITED)

被引：126

作者：

VONHELMOLT, R

WECKER, J

SAMWER, K

HAUPT, L

BARNER, K

机构：

[1] UNIV AUGSBURG, INST PHYS, D-86159 AUGSBURG, GERMANY

[2] UNIV GOTTINGEN, INST PHYS 4, D-37073 GOTTINGEN, GERMANY

来源：

JOURNAL OF APPLIED PHYSICS | 1994年 / 76卷 / 10期

关键词：

D O I：

10.1063/1.358118

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A large intrinsic magnetoresistance has been found near the ferromagnetic transition of metallic manganese oxides with perovskite-type crystal structure. The magnetic and transport properties were measured on bulk and thin-film La1-xAxMnO3+δ with A=Ca,Sr,Ba. Assuming the double-exchange model proposed by Zener [Phys. Rev. 81, 440 (1951); 82, 403 (1951)], the strong dependence of the transport properties on the magnetic field and also on the chemical composition is attributed to the mixed Mn 3+/Mn4+ valence.

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页码：6925 / 6928

页数：4

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