Stable Single-Crystalline Body Centered Cubic Fe Nanoparticles

Nano Letters ◽  
2011 ◽  
Vol 11 (4) ◽  
pp. 1641-1645 ◽  
Author(s):  
Lise-Marie Lacroix ◽  
Natalie Frey Huls ◽  
Don Ho ◽  
Xiaolian Sun ◽  
Kai Cheng ◽  
...  
Keyword(s):  
Body Centered Cubic ◽  
Single Crystalline ◽  
Crystalline Body ◽  
Fe Nanoparticles

scholarly journals Structure, morphology, and magnetic properties of Fe nanoparticles deposited onto single-crystalline surfaces

2011 ◽  
Vol 2 ◽  
pp. 47-56 ◽  
Author(s):  
Armin Kleibert ◽  
Wolfgang Rosellen ◽  
Mathias Getzlaff ◽  
Joachim Bansmann
Keyword(s):  
Magnetic Properties ◽  
Structural Properties ◽  
Critical Size ◽  
Magnetic Nanostructures ◽  
High Energy ◽  
Particle Orientation ◽  
Spin Orbital ◽  
Single Crystalline ◽  
Dependent Relation ◽  
Fe Nanoparticles

Background: Magnetic nanostructures and nanoparticles often show novel magnetic phenomena not known from the respective bulk materials. In the past, several methods to prepare such structures have been developed – ranging from wet chemistry-based to physical-based methods such as self-organization or cluster growth. The preparation method has a significant influence on the resulting properties of the generated nanostructures. Taking chemical approaches, this influence may arise from the chemical environment, reaction kinetics and the preparation route. Taking physical approaches, the thermodynamics and the kinetics of the growth mode or – when depositing preformed clusters/nanoparticles on a surface – the landing kinetics and subsequent relaxation processes have a strong impact and thus need to be considered when attempting to control magnetic and structural properties of supported clusters or nanoparticles. Results: In this contribution we focus on mass-filtered Fe nanoparticles in a size range from 4 nm to 10 nm that are generated in a cluster source and subsequently deposited onto two single crystalline substrates: fcc Ni(111)/W(110) and bcc W(110). We use a combined approach of X-ray magnetic circular dichroism (XMCD), reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM) to shed light on the complex and size-dependent relation between magnetic properties, crystallographic structure, orientation and morphology. In particular XMCD reveals that Fe particles on Ni(111)/W(110) have a significantly lower (higher) magnetic spin (orbital) moment compared to bulk iron. The reduced spin moments are attributed to the random particle orientation being confirmed by RHEED together with a competition of magnetic exchange energy at the interface and magnetic anisotropy energy in the particles. The RHEED data also show that the Fe particles on W(110) – despite of the large lattice mismatch between iron and tungsten – are not strained. Thus, strain is most likely not the origin of the enhanced orbital moments as supposed before. Moreover, RHEED uncovers the existence of a spontaneous process for epitaxial alignment of particles below a critical size of about 4 nm. STM basically confirms the shape conservation of the larger particles but shows first indications for an unexpected reshaping occurring at the onset of self-alignment. Conclusion: The magnetic and structural properties of nanoparticles are strongly affected by the deposition kinetics even when soft landing conditions are provided. The orientation of the deposited particles and thus their interface with the substrate strongly depend on the particle size with consequences regarding particularly the magnetic behavior. Spontaneous and epitaxial self-alignment can occur below a certain critical size. This may enable the obtainment of samples with controlled, uniform interfaces and crystallographic orientations even in a random deposition process. However, such a reorientation process might be accompanied by a complex reshaping of the particles.

scholarly journals Single-Crystalline Body Centered FeCo Nano-Octopods: From One-Pot Chemical Growth to a Complex 3D Magnetic Configuration

Nano Letters ◽  
2021 ◽  
Author(s):  
Cyril Garnero ◽  
Alexandre Pierrot ◽  
Christophe Gatel ◽  
Cécile Marcelot ◽  
Raul Arenal ◽  
...  
Keyword(s):  
Magnetic Configuration ◽  
One Pot ◽  
Single Crystalline ◽  
Crystalline Body

Magnetisation of isolated single crystalline Fe-nanoparticles measured by a ballistic Hall micro-magnetometer

2000 ◽  
Vol 10 (2) ◽  
pp. 259 ◽  
Author(s):  
L. Theil Kuhn ◽  
A.K. Geim ◽  
J.G.S. Lok ◽  
P. Hedegård ◽  
K. Ylänen ◽  
...  
Keyword(s):  
Single Crystalline ◽  
Fe Nanoparticles

Halide ion-mediated growth of single crystalline Fe nanoparticles

Nanoscale ◽  
2014 ◽  
Vol 6 (9) ◽  
pp. 4852-4856 ◽  
Author(s):  
Sen Zhang ◽  
Guangming Jiang ◽  
Gabriel T. Filsinger ◽  
Liheng Wu ◽  
Huiyuan Zhu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Single Crystalline ◽  
Fe Nanoparticles

We report a facile halide ion (Cl− or Br−) mediated synthesis of Fe nanoparticles (NPs) by thermal decomposition of Fe(CO)5.

An analysis on nanovoid growth in body-centered cubic single crystalline vanadium

2011 ◽  
Vol 50 (8) ◽  
pp. 2411-2421 ◽  
Author(s):  
S.Z. Xu ◽  
Z.M. Hao ◽  
Y.Q. Su ◽  
Y. Yu ◽  
Q. Wan ◽  
...  
Keyword(s):  
Body Centered Cubic ◽  
Single Crystalline ◽  
Nanovoid Growth

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

Recombination Characteristics of Single-Crystalline Silicon Wafers with a Damaged Near-Surface Layer

2013 ◽  
Vol 58 (2) ◽  
pp. 142-150 ◽  
Author(s):  
A.V. Sachenko ◽  
◽  
V.P. Kostylev ◽  
V.G. Litovchenko ◽  
V.G. Popov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Crystalline Silicon ◽  
Silicon Wafers ◽  
Single Crystalline Silicon ◽  
Near Surface ◽  
Single Crystalline

Synthesis of Jumbo-size Single Crystalline Bi$lt;inf$gt;2$lt;/inf$gt;Se$lt;inf$gt;3$lt;/inf$gt; Nanoplates and Nanoribbons by Vapor Transportation

2014 ◽  
Vol 29 (11) ◽  
pp. 1199
Author(s):  
LI Xiao-Shuai ◽  
WANG Zeng-Mei ◽  
ZHU Ming-Fang ◽  
WANG Shan-Peng ◽  
TAO Xu-Tang ◽  
...  
Keyword(s):  
Single Crystalline
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