Ferromagnetism of self-organized Ge1-xMnx nano-pillars

被引：4

作者：

Devillers, T. ^{[1
]}

Jamet, M. ^{[1
]}

Barski, A. ^{[1
]}

Poydenot, V. ^{[1
]}

Dujardin, R. ^{[1
]}

Bayle Guillemaud, P. ^{[1
]}

Rothman, J. ^{[2
]}

Bellet Amalric, E. ^{[1
]}

Cibert, J. ^{[3
]}

Mattana, R. ^{[1
]}

Tatarenko, S. ^{[4
]}

机构：

[1] CEA, Serv Phys Mat & Microstruct, Dept Rech Fondamentale Mat Condensee, 17 Ave Martyrs, F-38054 Grenoble 9, France

[2] CEA Grenoble, Lab Infrarouge, Lab Elect Technol Informat, F-38054 Grenoble, France

[3] CNRS, Lab Louis Neel, F-38042 Grenoble, France

[4] Lab Spectrometrie Phys, F-38042 Saint Martin Heres, France

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 12 | 2006年 / 3卷 / 12期

关键词：

D O I：

10.1002/pssc.200672806

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the search for high-T-C Si or Ge based ferromagnetic semiconductors, we present here the magnetic and transport properties of Ge1-xMnx nano-pillars. These pillars self-organize during the MBE growth of thin Mn doped (6 %) Ge films as a consequence of the in-plane and out-of-plane diffusion of Mn atoms. Their composition is close to Ge2Mn and their average diameter and spacing are 3 nm and 10 nm respectively. Magnetic measurements evidence a ferromagnetic phase up to 400 K giving rise to anomalous Hall effect at room temperature. Moreover we evidence a large positive magnetoresistance (up to 7000 % at 30 K and 9 T) probably due to the conductivity mismatch between the Mn-rich nano-pillars and the Mn-poor surrounding Ge matrix.

引用

页码：4123 / 4126

页数：4

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