Spin waves throughout the Brillouin zone and magnetic exchange coupling in the ferromagnetic metallic manganites La1-xCaxMnO3 (x=0.25,0.30)

	Spin waves throughout the Brillouin zone and magnetic exchange coupling in the ferromagnetic metallic manganites La1-xCaxMnO3 (x=0.25,0.30)
	Ye, F ; Dai, PC ; Fernandez-Baca, JA ; Adroja, DT ; Perring, TG ; Tomioka, Y ; Tokura, Y
刊名	PHYSICAL REVIEW B
	2007
卷号	75 期号:14
关键词	EXCITATION SPECTRUM DYNAMICS RANDOMNESS SYSTEMS MODEL
ISSN号	1098-0121
通讯作者	Ye, F (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
中文摘要	Using time-of-flight and triple-axis inelastic neutron spectroscopy, we determine spin-wave excitations throughout the Brillouin zone for ferromagnetic manganites La1-xCaxMnO3 (x=0.25,0.3) in their low-temperature metallic states. While spin-wave excitations in the long-wavelength limit (spin stiffness D) have similar values for both compounds, the excitations near the Brillouin-zone boundary of La0.7Ca0.3MnO3 are considerably softened in all symmetry directions compared to that of La0.75Ca0.25MnO3. A Heisenberg model with the nearest neighbor and the fourth neighbor exchange interactions can describe the overall dispersion curves fairly well. We compare the data with various theoretical models describing the spin excitations of ferromagnetic manganites.
收录类别	SCI
语种	英语
公开日期	2014-02-20
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57856]
专题	物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文
推荐引用方式 GB/T 7714	Ye, F,Dai, PC,Fernandez-Baca, JA,et al. Spin waves throughout the Brillouin zone and magnetic exchange coupling in the ferromagnetic metallic manganites La1-xCaxMnO3 (x=0.25,0.30)[J]. PHYSICAL REVIEW B,2007,75(14).
APA	Ye, F.,Dai, PC.,Fernandez-Baca, JA.,Adroja, DT.,Perring, TG.,...&Tokura, Y.(2007).Spin waves throughout the Brillouin zone and magnetic exchange coupling in the ferromagnetic metallic manganites La1-xCaxMnO3 (x=0.25,0.30).PHYSICAL REVIEW B,75(14).
MLA	Ye, F,et al."Spin waves throughout the Brillouin zone and magnetic exchange coupling in the ferromagnetic metallic manganites La1-xCaxMnO3 (x=0.25,0.30)".PHYSICAL REVIEW B 75.14(2007).