Self-ordered magnetic α-FeSi2 nano-stripes on Si(111)

J. K. Tripathi; G. Markovich; I. Goldfarb

doi:10.1063/1.4812239

Self-ordered magnetic α-FeSi₂ nano-stripes on Si(111)

J. K. Tripathi, G. Markovich, I. Goldfarb^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

We fabricated self-assembled one-dimensional α-FeSi₂ magnetic nano-stripes, using solid phase epitaxy of ∼1 monolayer Fe on vicinal Si(111) surfaces followed by a 550 °C annealing. Structural and magnetic properties were investigated by scanning tunneling microscopy and superconducting quantum interference device magnetometry, respectively. The nano-stripes show superparamagnetism at room-temperature and at 4 K coercivity about 3 times higher along the long nano-stripe [11 2 ̄] direction than along the perpendicular [1 ̄ 10] one. The calculated magnetic moment at 4 K was ∼3.3 μ B/Fe atom, implying a significant ferromagnetic coupling of the Fe atoms in the system. Such nano-stripes may be useful in high-density magnetic memory storage and spintronics devices.

Original language	English
Article number	251604
Journal	Applied Physics Letters
Volume	102
Issue number	25
DOIs	https://doi.org/10.1063/1.4812239
State	Published - 24 Jun 2013

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10.1063/1.4812239

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title = "Self-ordered magnetic α-FeSi2 nano-stripes on Si(111)",

abstract = "We fabricated self-assembled one-dimensional α-FeSi2 magnetic nano-stripes, using solid phase epitaxy of ∼1 monolayer Fe on vicinal Si(111) surfaces followed by a 550 °C annealing. Structural and magnetic properties were investigated by scanning tunneling microscopy and superconducting quantum interference device magnetometry, respectively. The nano-stripes show superparamagnetism at room-temperature and at 4 K coercivity about 3 times higher along the long nano-stripe [11 2{\= }] direction than along the perpendicular [1{\= } 10] one. The calculated magnetic moment at 4 K was ∼3.3 μ B/Fe atom, implying a significant ferromagnetic coupling of the Fe atoms in the system. Such nano-stripes may be useful in high-density magnetic memory storage and spintronics devices.",

author = "Tripathi, {J. K.} and G. Markovich and I. Goldfarb",

note = "Funding Information: The authors acknowledge the technical support of M. Levinshtein. This research was supported by the Israel Science Foundation (Grant No. 410/08), and one of the authors (JKT) by the Tel Aviv University Research Center for Nanoscience and Nanotechnology post-doctoral fund.",

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AU - Tripathi, J. K.

AU - Markovich, G.

AU - Goldfarb, I.

N1 - Funding Information: The authors acknowledge the technical support of M. Levinshtein. This research was supported by the Israel Science Foundation (Grant No. 410/08), and one of the authors (JKT) by the Tel Aviv University Research Center for Nanoscience and Nanotechnology post-doctoral fund.

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Y1 - 2013/6/24

N2 - We fabricated self-assembled one-dimensional α-FeSi2 magnetic nano-stripes, using solid phase epitaxy of ∼1 monolayer Fe on vicinal Si(111) surfaces followed by a 550 °C annealing. Structural and magnetic properties were investigated by scanning tunneling microscopy and superconducting quantum interference device magnetometry, respectively. The nano-stripes show superparamagnetism at room-temperature and at 4 K coercivity about 3 times higher along the long nano-stripe [11 2 ̄] direction than along the perpendicular [1 ̄ 10] one. The calculated magnetic moment at 4 K was ∼3.3 μ B/Fe atom, implying a significant ferromagnetic coupling of the Fe atoms in the system. Such nano-stripes may be useful in high-density magnetic memory storage and spintronics devices.

AB - We fabricated self-assembled one-dimensional α-FeSi2 magnetic nano-stripes, using solid phase epitaxy of ∼1 monolayer Fe on vicinal Si(111) surfaces followed by a 550 °C annealing. Structural and magnetic properties were investigated by scanning tunneling microscopy and superconducting quantum interference device magnetometry, respectively. The nano-stripes show superparamagnetism at room-temperature and at 4 K coercivity about 3 times higher along the long nano-stripe [11 2 ̄] direction than along the perpendicular [1 ̄ 10] one. The calculated magnetic moment at 4 K was ∼3.3 μ B/Fe atom, implying a significant ferromagnetic coupling of the Fe atoms in the system. Such nano-stripes may be useful in high-density magnetic memory storage and spintronics devices.

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Self-ordered magnetic α-FeSi₂ nano-stripes on Si(111)

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