Fabrication and magnetic properties of Fe3O4 nanowire arrays in different diameters

Zhang, Liying; Zhang, Yafei

doi:10.1016/j.jmmm.2008.09.036

Cited by 99 publications

(35 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5c, 21a] Nevertheless, superparamagnetism remains after T B as a consequence of the anisotropic barrier blockage of the magnetisation orientation of the magnetic layer forming the hybrid fibril cooled with the ZFC process. [31] The larger T B and the less steep slope for magnetite nanoparticles in the above figure could be consistent with: i) a larger dipolar coupling, [27,32] or ii) larger size and anisotropy in the dispersions as a result of some degree of aggregation between the particles, which involves a larger number of nearest neighbouring particles than in the case of magnetic wires and a non-regular distribution of the particles in the aggregates, in contrast to what would be expected in the 1D nanowires. This implies that dipolar interactions will not equally affect all particles in the nanoparticle aggregates, giving rise to the observed broadening in T B .…”

Section: Introductionsupporting

confidence: 72%

One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating

Juárez

Cambón

Topete

et al. 2011

Chemistry A European J

View full text Add to dashboard Cite

Magnetic nanowires were obtained through the in situ synthesis of magnetic material by Fe-controlled nanoprecipitation in the presence of two different protein (human serum albumin (HSA) and lysozyme (Lys)) fibrils as biotemplating agents. The structural characteristics of the biotemplates were transferred to the hybrid magnetic wires. They exhibited excellent magnetic properties as a consequence of the 1D assembly and fusion of magnetite nanoparticles as ascertained by SQUID magnetometry. Prompted by these findings, we also checked their potential applicability as MRI contrast agents. The magnetic wires exhibited large r(2)* relaxivities and sufficient contrast resolution even in the presence of an extremely small amount of Fe in the magnetic hybrids, which would potentially enable their use as T(2) contrast imaging agents.

show abstract

Section: Introductionsupporting

confidence: 72%

One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating

Juárez

Cambón

Topete

et al. 2011

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…[32][33][34] However, positive and negative magnetoresistance effect is observed in Fe 3 O 4 heterostructures. 35 In bulk and thin film Fe 3 O 4 systems, magnetoresistance is attributed to the filed-induced alignment of grains or antiphase domains. 20,36 Exclusive positive magnetoresistance is attributed to the nanocontact barrier, 37 and high degree of spin polarization in In summary, we report on the template-based synthesis of high-definition MOM heterojunction Au-Fe 3 O 4 -Au nanowire system.…”

Section: -mentioning

confidence: 99%

Heterojunction metal-oxide-metal Au-Fe3O4-Au single nanowire device for spintronics

Reddy

Padture

Punnoose

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

In this report, we present the synthesis of heterojunction magnetite nanowires in alumina template and describe magnetic and electrical properties from a single nanowire device for spintronics applications. Heterojunction Au-Fe-Au nanowire arrays were electrodeposited in porous aluminum oxide templates, and an extensive and controlled heat treatment process converted Fe segment to nanocrystalline cubic magnetite phase with well-defined Au-Fe3O4 interfaces as confirmed by the transmission electron microscopy. Magnetic measurements revealed Verwey transition shoulder around 120 K and a room temperature coercive field of 90 Oe. Current–voltage (I-V) characteristics of a single Au-Fe3O4-Au nanowire have exhibited Ohmic behavior. Anomalous positive magnetoresistance of about 0.5% is observed on a single nanowire, which is attributed to the high spin polarization in nanowire device with pure Fe3O4 phase and nanocontact barrier. This work demonstrates the ability to preserve the pristine Fe3O4 and well defined electrode contact metal (Au)–magnetite interface, which helps in attaining high spin polarized current.

show abstract

“…2 J is the exchange interaction in the core. 3 J is the nearest neighbour exchange parameter between magnetic atoms at the outer shell. S D is the anisotropy(i.e.…”

Section: The Modelmentioning

confidence: 99%

“…Diverse applications require magnetic material having different magnetic properties. For example, perpendicular magnetic anisotropy is essential when nanowires are used as magnetic recording media [3]. The physical properties of one-dimensional nanostructures of magnetic materials are presently the subject of intensive research, taking into account the considerable attention they have recently received and the few cases reported.…”

Section: Introductionmentioning

confidence: 99%

Effects of Anisotropy and Longitudinal Field on a Ferrimagnetic Nanowire

Mohamad

Hamade

2015

ILCPA

View full text Add to dashboard Cite

A ferrimagnetic nanowire consists of the spin-1/2 core and spin-1 outer shell has been studied. The general formula for the temperature dependence of the longitudinal magnetization of the system is given. The ferrimagnetic core-shell nanowire system exhibits two and three compensation points when the temperature of the system is changed at fixed values of the anisotropy of shell sublattice and longitudinal field, respectively. The competition among the exchange coupling between the outer shell and core, the outer shell coupling, the anisotropy, the applied field, and the temperature has a considerable effect on the characteristic of magnetic properties in a two-dimensional nanowire system.

show abstract

Fabrication and magnetic properties of Fe3O4 nanowire arrays in different diameters

Cited by 99 publications

References 34 publications

One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating

One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating

Heterojunction metal-oxide-metal Au-Fe3O4-Au single nanowire device for spintronics

Effects of Anisotropy and Longitudinal Field on a Ferrimagnetic Nanowire

Contact Info

Product

Resources

About