A MOSSBAUER-EFFECT STUDY OF BARIUM FERRITE BALL-MILLED IN AIR

被引：13

作者：

CAMPBELL, SJ ^{[1
]}

WU, E ^{[1
]}

KACZMAREK, WA ^{[1
]}

JAYASURIYA, KD ^{[1
]}

机构：

[1] AUSTRALIAN NATL UNIV,RES SCH PHYS SCI & ENGN,DEPT APPL MATH,CANBERRA,ACT 0200,AUSTRALIA

来源：

HYPERFINE INTERACTIONS | 1994年 / 92卷 / 1-4期

关键词：

D O I：

10.1007/BF02065715

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The effects of dry-milling BaFe12O19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and Mossbauer effect measurements. The sizes of the BaFe12O19 particles decrease on milling, as expected, although a partial decomposition of BaFe12O19 to alpha-Fe2O3 is found to rake place on extended milling (1000 h). The room temperature Mossbauer spectra are consistent with superparamagnetic relaxation associated with the fine BaFe12O19 and alpha-Fe2O3 particles. The X-ray diffraction patterns of all the milled samples exhibit features indicative of a disordered structural state, consistent with the nanoscale particles and a nanostructured state.

引用

页码：933 / 941

页数：9

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