Magnetic Fluids: Fabrication, Magnetic Properties, and Organization of Nanocrystals

Abstract

In this paper we outline different ways to make magnetic fluids from colloidal self‐assemblies (normal and reverse micelles) and describe the preparation of both ferrite nanocrystals with various compositions and cobalt metal nanocrystals. The general magnetic behaviors are described but it is found that these are not applicable to the whole variety of ferrites produced. Ferrite and cobalt magnetic fluids are organized in 3D superlattices to form various mesoscopic structures. Within a number of limitations, the magnetic properties of both the above nanocrystals and these fluids have been determined and described.

Structural, Morphological, and Magnetic Properties of the Mesoporous Maghemite Synthesized by a Citrate Method

“…Розроблення нових способів одержання нанодисперсних чи наност-руктурованих оксидів заліза дозволило створити матеріяли з нови-ми функціональними властивостями, що використовуються як електроди електрохемічних джерел струму [1], компоненти магне-тних рідин [2], контрастних матеріялів для магнеторезонансної то-мографії [3], біологічних маркерів [4], систем сепарації біологічних об'єктів і токсинів [5]. На сьогодні особливий інтерес викликають біомедичні перспективи застосування феромагнетних наночасти-нок магнетиту Fe 3 O 4 та магеміту -Fe 2 O 3 для лікування раку мето-дом гіпертермії [6] та цільової доставки ліків [7].…”

Effect of High Magnetic Field on Ferrite Materials Obtained by Calcination of Layered Double Hydroxide

“…They had sharp and symmetric peaks at low 2 angle and diffraction patterns due to lamellar compounds. All products were identified to a single phase of LDH and no other peaks such as Mg(OH) 2 and Fe(OH) 3 were present. Lattice parameters (a-and c-axis) for MgFe-LDH calculated from the position of XRD peaks are summarized in Table 1.…”

“…This is widely used in various fields like a magnetic memory media, an electric component, a microwave device, and so on. [1][2][3][4] Spinel has a face-centered cubic structure in which A and B sites occupy tetrahedral and octahedral location, respectively. There are two types of spinel structure derived from different location of cation.…”

Formation and strain distribution of Ni/NiO core/shell magnetic nanoparticles fabricated by pulsed laser deposition

“…Studies on systems of small magnetic particles with sizes in the nanometer scale have been the object of intensive research because of their many potential applications, including data storage and spintronic devices [1,2]. Among the various types of magnetic particles, there are some particles fabricated from a transition metal and below a certain critical size showing the superparamagnetism [3], a unique property derived from the fluctuation of magnetization due to thermal energy.…”