Structural and magnetic properties of Mn5Ge3 clusters in a dilute magnetic germanium matrix

被引：115

作者：

Bihler, C

Jaeger, C

Vallaitis, T

Gjukic, M

Brandt, MS

Pippel, E

Woltersdorf, J

Gösele, U

机构：

[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

[2] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 11期

关键词：

D O I：

10.1063/1.2185448

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have characterized the structural and magnetic properties of low-temperature molecular-beam epitaxy grown Ge:Mn by means of high-resolution transmission electron microscopy (HR-TEM), energy dispersive x-ray spectroscopy, and superconducting quantum interference device (SQUID) magnetometry. We find a coherent incorporation of Mn5Ge3 clusters in an epitaxially grown Ge:Mn matrix, which shows the characteristics of a diluted magnetic semiconductor phase of Mn-doped Ge. The clusters are preferentially oriented with the hexagonal [0001] direction parallel to the [001] growth direction of the Ge:Mn matrix, as determined from both HR-TEM and SQUID measurements. (c) 2006 American Institute of Physics.

引用

收藏

页数：3

相关论文

共 22 条

[1] Effect of low-temperature annealing on (Ga,Mn)As trilayer structures [J].

Chiba, D ;

Takamura, K ;

Matsukura, F ;

Ohno, H .

APPLIED PHYSICS LETTERS, 2003, 82 (18) :3020-3022

[2] Mn interstitial diffusion in (Ga,Mn)As [J].

Edmonds, KW ;

Boguslawski, P ;

Wang, KY ;

Campion, RP ;

Novikov, SN ;

Farley, NRS ;

Gallagher, BL ;

Foxon, CT ;

Sawicki, M ;

Dietl, T ;

Nardelli, MB ;

Bernholc, J .

PHYSICAL REVIEW LETTERS, 2004, 92 (03) :4

[3] THE SPATIAL-DISTRIBUTION OF MAGNETIZATION DENSITY IN MN5GE3 [J].

FORSYTH, JB ;

BROWN, PJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (11) :2713-2720

[4] Ferromagnetic resonance studies of (Ga,Mn)As with MnAs clusters [J].

Hartmann, T ;

Lampalzer, M ;

Klar, PJ ;

Stolz, W ;

Heimbrodt, W ;

von Nidda, HAK ;

Loidl, A ;

Svistov, L .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2002, 13 (2-4) :572-576

[5]

HEIMBRODT W, 2005, J SUPERCOND, P1

[6] Magnetic and transport percolation in diluted magnetic semiconductors [J].

Kaminski, A ;

Das Sarma, S .

PHYSICAL REVIEW B, 2003, 68 (23)

[7] Polaron percolation in diluted magnetic semiconductors [J].

Kaminski, A ;

Das Sarma, S .

PHYSICAL REVIEW LETTERS, 2002, 88 (24) :4

[8] Spatial chemical inhomogeneity and local electronic structure of Mn-doped Ge ferromagnetic semiconductors [J].

Kang, JS ;

Kim, G ;

Wi, SC ;

Lee, SS ;

Choi, S ;

Cho, S ;

Han, SW ;

Kim, KH ;

Song, HJ ;

Shin, HJ ;

Sekiyama, A ;

Kasai, S ;

Suga, S ;

Min, BI .

PHYSICAL REVIEW LETTERS, 2005, 94 (14)

[9] Room-temperature ferromagnetism in Ge1-xMnx nanowires -: art. no. 094415 [J].

Kazakova, O ;

Kulkarni, JS ;

Holmes, JD ;

Demokritov, SO .

PHYSICAL REVIEW B, 2005, 72 (09)

[10] Ferromagnetic percolation in MnxGe1-x dilute magnetic semiconductor -: art. no. 152507 [J].

Li, AP ;

Shen, J ;

Thompson, JR ;

Weitering, HH .

APPLIED PHYSICS LETTERS, 2005, 86 (15) :1-3