FMR OF SINGLE-CRYSTAL MNAS1-DELTA

被引：3

作者：

PAPE, J

SCHUNEMANN, JW

RAGER, H

SONDERMANN, U

BARNER, K

机构：

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

[2] PHILIPS UNIV MARBURG,INST MINERAL,D-20095 HAMBURG,GERMANY

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1994年 / 144卷 / 01期

关键词：

D O I：

10.1002/pssa.2211440123

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microwave absorption in MnAs poly- and single crystals below T(u) are identified as FMR whose resonance frequencies are determined by magnetocrystalline anisotropy. It is found that K1 = -5.7 x 10(5) J/m3; K2 = 2.1 x 10(5) J/m3; K3 = -2.0 x 10(5) J/m3 in accord with the literature. The FMR linewidths are unusually large, suggesting a distribution of exchange couplings and an additional central peak is observed in a large temperature range, suggesting a spin fluctuation spectrum which may be retrieved by a more involved calculation.

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页码：203 / 215

页数：13

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