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首页> 外文期刊>Physica, B. Condensed Matter >Spin-polarized electron momentuin density distributions REMn2Ge2 (RE = Gd, La)
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Spin-polarized electron momentuin density distributions REMn2Ge2 (RE = Gd, La)

机译:自旋极化电子矩密度分布REMn2Ge2(RE = Gd,La)

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The spin-polarized electron momentum distributions (EMD) for ferrimagnetic GdMn2Ge2 and ferromagnetic LaMn2Ge2 have been measured using the magnetic Compton scattering technique. The spin-polarized EMDs were resolved along the c-axis at 15 K. In the Gd sample, the Gd and Mn spin sublattices are aligned antiparallel with spin moments of 6.8+/-0.1 mu(B) per formula unit (FU-1) and 3.7+/-0.1 mu(B) FU-1, respectively, with the Gd spin sublattice oriented parallel to the scattering vector. The ferromagnetic La system exhibits no 4f moment and the Mn moment is aligned parallel to the scattering vector, the ordered spin moment on the Mn being 2.4 +/- 0.1 mu(B) FU-1. The two samples measured are the extreme points of the phase diagram for Gd1-xLaxMn2Ge2. Our data give a direct indication of the sublattice reorientation at x approximate to 0.5, implied from previous magnetization measurements and indicate that at a low temperature the Mn sublattice is a canted ferromagnetic system. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 17]
机译:使用磁性康普顿散射技术测量了亚铁磁性GdMn2Ge2和铁磁性LaMn2Ge2的自旋极化电子动量分布(EMD)。自旋极化的EMD在15 K时沿c轴分解。在Gd样品中,Gd和Mn自旋亚晶格反平行排列,自旋矩为每个公式单位6.8 +/- 0.1 mu(B)(FU-1 )和3.7 +/- 0.1 mu(B)FU-1,Gd自旋亚晶格的方向平行于散射矢量。铁磁La系统没有4f矩,Mn矩与散射矢量平行排列,Mn上的有序自旋矩为2.4 +/- 0.1 mu(B)FU-1。测得的两个样品是Gd1-xLaxMn2Ge2相图的极点。我们的数据直接给出了x处亚晶格重新定向的指示,这从先前的磁化测量中可以得出,并表明在低温下Mn亚晶格是倾斜的铁磁系统。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:17]

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