Magnetic ordering and phase transition in MnO embedded in a porous glass

被引：78

作者：

Golosovsky, IV ^{[1
]}

Mirebeau, I

André, G

Kurdyukov, DA

Kumzerov, YA

Vakhrushev, SB

机构：

[1] St Petersburg Nucl Phys Inst, St Petersburg 188350, Russia

[2] Ctr Etud Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.86.5783

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the results of a neutron diffraction study of the antiferromagnet MnO embedded in a porous glass. The type of magnetic ordering and the structural distortion are similar to those of the bulk, but the ordered magnetic moment of 3.84(4)mu (B)/ion is strongly reduced and the Neel temperature is enhanced. The magnetic transition is second order, in contrast to the first order transition of the bulk. The size of the magnetic region is smaller than the average size of the nanoparticles. The reasons for this behavior are discussed.

引用

页码：5783 / 5786

页数：4

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