ANOMALOUS LOW-FREQUENCY BUTTERFLY CURVES FOR SUBSIDIARY AND FERROMAGNETIC-RESONANCE OVERLAP AT 3 GHZ

被引：6

作者：

CROSS, RW ^{[1
]}

PATTON, CE ^{[1
]}

SRINIVASAN, G ^{[1
]}

BOOTH, JG ^{[1
]}

CHEN, M ^{[1
]}

机构：

[1] COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523

来源：

JOURNAL OF APPLIED PHYSICS | 1991年 / 69卷 / 03期

关键词：

D O I：

10.1063/1.347251

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Subsidiary absorption butterfly curves of spin-wave instability threshold versus static in-plane field have been obtained for yttrium iron garnet (YIG) thin films at 3 GHz. The butterfly curves have been found to be rather anomalous, typically displaying a pronounced dip and a very low minimum threshold. These anomalous features are attributed to the overlap of the subsidiary absorption field region with ferromagnetic resonance (FMR). First-order instability theory was extended to include the uniform mode response near FMR. The extended theory yields good fits to the data for reasonable values of the YIG FMR linewidths. The theoretical analysis also shows a predicted flip in the azimuthal propagation angle phi-k for the unstable spin waves in the region of FMR overlap. With increasing field, there are predicted discontinuous changes in rho-k from 90-degrees to 0-degrees and back to 90-degrees in the region of FMR.

引用

页码：1569 / 1573

页数：5

共 7 条

[1]

Patton C. E., 1975, Magnetic oxides. pt.2, P575

[2] ANOMALOUS SUBSIDIARY ABSORPTION IN SINGLE-CRYSTAL YIG AND EVALUATION OF SPIN-WAVE LINEWIDTH [J].