Free-Standing and Single-Crystalline Fe1–xMnxSi Nanowires with Room-Temperature Ferromagnetism and Excellent Magnetic Response

Hung, Min-Hsiu; Wang, Chiu‐Yen; Tang, Jianshi; Lin, Ching-Chun; Hou, Te-Chien; Jiang, Xiaowei; Wang, Kang L.; Chen, Lih‐Juann

doi:10.1021/nn300344k

Cited by 17 publications

(11 citation statements)

References 44 publications

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“…To study the onset of the magnetic phase transition in nanoscale material systems, it is quite difficult to use conventional methods such as superconducting quantum interference devices (SQUID) and Hall or Torque magnetometries, − because of the extremely weak magnetic signal, for single nanowires in particular. However, the strong correlation between the magnetism and the electrical transport in magnetic systems, namely, a conductivity signature accompanied with a magnetic phase transition, enables the latter to be probed electrically.…”

Section: Resultsmentioning

confidence: 99%

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire

et al. 2012

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In this Letter, the magnetic phase transition and domain wall motion in a single-crystalline Mn(5)Ge(3) nanowire were investigated by temperature-dependent magneto-transport measurements. The ferromagnetic Mn(5)Ge(3) nanowire was fabricated by fully germaniding a single-crystalline Ge nanowire through the solid-state reaction with Mn contacts upon thermal annealing at 450 °C. Temperature-dependent four-probe resistance measurements on the Mn(5)Ge(3) nanowire showed a clear slope change near 300 K accompanied by a magnetic phase transition from ferromagnetism to paramagnetism. The transition temperature was able to be controlled by both axial and radial magnetic fields as the external magnetic field helped maintain the magnetization aligned in the Mn(5)Ge(3) nanowire. Near the magnetic phase transition, the critical behavior in the 1D system was characterized by a power-law relation with a critical exponent of α = 0.07 ± 0.01. Besides, another interesting feature was revealed as a cusp at about 67 K in the first-order derivative of the nanowire resistance, which was attributed to a possible magnetic transition between two noncollinear and collinear ferromagnetic states in the Mn(5)Ge(3) lattice. Furthermore, temperature-dependent magneto-transport measurements demonstrated a hysteretic, symmetric, and stepwise axial magnetoresistance of the Mn(5)Ge(3) nanowire. The interesting features of abrupt jumps indicated the presence of multiple domain walls in the Mn(5)Ge(3) nanowire and the annihilation of domain walls driven by the magnetic field. The Kurkijärvi model was used to describe the domain wall depinning as thermally assisted escape from a single energy barrier, and the fitting on the temperature-dependent depinning magnetic fields yielded an energy barrier of 0.166 eV.

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Section: Resultsmentioning

confidence: 99%

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire

et al. 2012

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“…Among numerous NWs, metal silicide NWs have been widely studied for their excellent compatibility with Si device processing and special physical properties such as ideal contact resistance (NiSi, PtSi), thermoelectricity (CrSi 2 , MnSi 1.7 − ), magnetism (MnSi, CoSi − ), and field-emission (TiSi 2 , Ti 5 Si 3 ). In addition to binary silicide NWs, ternary silicide NWs, for instance, Fe 1– x Co x Si and Fe 1– x Mn x Si, had been synthesized with several exceptional characteristics as well. Typically, most silicide NWs are synthesized through thermal evaporation based on chemical vapor transport (CVT) , or chemical vapor deposition (CVD) − mechanism, which is low cost and great yield but nondirectional, limiting synthesis of single phase silicide NWs.…”

Section: Methodsmentioning

confidence: 99%

Nickel/Platinum Dual Silicide Axial Nanowire Heterostructures with Excellent Photosensor Applications

Huang

Chiu

et al. 2016

Nano Lett.

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Transition metal silicide nanowires (NWs) have attracted increasing attention as they possess advantages of both silicon NWs and transition metals. Over the past years, there have been reported with efforts on one silicide in a single silicon NW. However, the research on multicomponent silicides in a single silicon NW is still rare, leading to limited functionalities. In this work, we successfully fabricated β-Pt2Si/Si/θ-Ni2Si, β-Pt2Si/θ-Ni2Si, and Pt, Ni, and Si ternary phase axial NW heterostructures through solid state reactions at 650 °C. Using in situ transmission electron microscope (in situ TEM), the growth mechanism of silicide NW heterostructures and the diffusion behaviors of transition metals were systematically studied. Spherical aberration corrected scanning transmission electron microscope (Cs-corrected STEM) equipped with energy dispersive spectroscopy (EDS) was used to analyze the phase structure and composition of silicide NW heterostructures. Moreover, electrical and photon sensing properties for the silicide nanowire heterostructures demonstrated promising applications in nano-optoeletronic devices. We found that Ni, Pt, and Si ternary phase nanowire heterostructures have an excellent infrared light sensing property which is absent in bulk Ni2Si or Pt2Si. The above results would benefit the further understanding of heterostructured nano materials.

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“…Ferromagnetic Fe 1.3 Ge NWs were grown on sapphire and epitaxially on graphite (few-layer graphene or highly-oriented pyrolitic graphite) using chemical vapour transport (Yoon et al 2011). The same technique was employed for the preparation of magnetic Si-based NWs containing ferromagnetic metal and/or Mn, such as Fe 1−x Mn x Si (Hung et al 2012). Aside from semiconductor-based nanowires, one can also prepare single-crystalline Ni NWs (Chan et al 2012), Co (Kim et al 2015), and alloys NiCo, CoFe, and NiFe; aside from Ni and Co (Scott et al 2016).…”

Section: Other Techniquesmentioning

confidence: 99%

Magnetic Nanowires and Nanotubes

Staňo

Fruchart

2018

Handbook of Magnetic Materials

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We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By nano we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry (change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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Free-Standing and Single-Crystalline Fe_1–xMn_xSi Nanowires with Room-Temperature Ferromagnetism and Excellent Magnetic Response

Cited by 17 publications

References 44 publications

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire

Nickel/Platinum Dual Silicide Axial Nanowire Heterostructures with Excellent Photosensor Applications

Magnetic Nanowires and Nanotubes

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Free-Standing and Single-Crystalline Fe1–xMnxSi Nanowires with Room-Temperature Ferromagnetism and Excellent Magnetic Response

Cited by 17 publications

References 44 publications

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn5Ge3 Nanowire

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn5Ge3 Nanowire

Nickel/Platinum Dual Silicide Axial Nanowire Heterostructures with Excellent Photosensor Applications

Magnetic Nanowires and Nanotubes

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Product

Resources

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Free-Standing and Single-Crystalline Fe_1–xMn_xSi Nanowires with Room-Temperature Ferromagnetism and Excellent Magnetic Response

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire

Electrical Probing of Magnetic Phase Transition and Domain Wall Motion in Single-Crystalline Mn₅Ge₃ Nanowire