Magnetic circular dichroism of LaMn1-xAlxO3+δ series of samples

被引：2

作者：

Banerjee, A

Chaudhari, SM

Krishnan, RV

Dasannacharya, BA

Muro, T

Saitoh, Y

Imada, S

Suga, S

机构：

[1] Inter Univ Consortium, DAE Facil, Indore 452017, India

[2] JASRI, Mikazuki, Hyogo 6795143, Japan

[3] JAERI, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan

[4] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2003年 / 199卷

关键词：

magnetic circular dichroism; ferromagnetism; oxide magnetism;

D O I：

10.1016/S0168-583X(02)01419-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report magnetic circular dichroism (MCD) studies on the polycrystalline LaMn1-xAlxO3+delta series with x = 0-0.2. The Mn-2p MCD was recorded in the temperature range from 45 to 300 K for samples with x = 0, 0.075, 0.1 and 0.15. It was seen that unlike ac-susceptibility no second transition in MCD was observed at lower temperatures in the samples with x greater than or equal to 0.075 indicating that it is not intrinsic to the samples but arise out of the dynamics of ferromagnetic clusters in the polycrystalline sample. More significantly, the MCD signal persists even 100 K above the ferromagnetic T-C confirming that the observation of the magnetic correlation above T-C in bulk measurement is intrinsic to this type of systems. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：308 / 312

页数：5

共 7 条

[1] Evidence for magnetic polarons in the magnetoresistive perovskites [J].