Magnetic properties of iron

It should be noted that the magnetic properties of iron are dependent on purity of the iron and the nature of any impurities.)... 

Iron—Aluminum and Iron—Aluminum—Silicon Alloys. The influence of aluminum on the physical and magnetic properties of iron is similar to that of silicon, ie, stabilization of the bcc phase, increased resistivity, decreased ductility, and decreased saturation magnetization, magnetocrystalline anisotropy, and magnetostriction. Whereas Si—Ee alloys are well estabHshed for electrical appHcations, the aluminum—iron alloys have not been studied commercially. However, small (up to ca 0.3%) amounts of A1 have been added to the nonoriented grades of siHcon steel, because the decrease in ductiHty is less with A1 than with Si. 

Magnetic properties of iron nanocrystals nested in carbon cages, which grew on the cathode deposit, have been studied by Fliura el al.[29]. Magnetization (M-H) curves showed that the coercive force. He, of... 

Sohn B.H., Cohen R.E., and Papaefthymiou G.C., Magnetic properties of iron oxide nanoclusters within microdomains of block copolymers, J. Magn. Magn. Mater., 182, 216, 1998. 

Compasses using the magnetic properties of iron have been used for around 1000 years. 

The magnetic properties of iron oxides can be determined using Mossbauer spectroscopy, neutron powder diffraction and magnetometry (see Chap. 7). The characteristic parameters are the magnetic moment, the permeability, the saturation magnetization, the magnetic anisotropy constants and the Bhf (Tab. 6.2). 

Coey, J.M.D. (1988) Magnetic properties of iron in soil iron oxides and clay minerals. In Stucki, J.W. Goodman, B.A. Schwert-mann, U. (eds.) Iron in soils and clay minerals. D. Reidel Publ. Co., 397-466... 

Swedish physicist, astronomer, and spec-troscopist. He mapped the spectra of yttrium, erbium, didymium, lanthanum, scandium, thulium, and ytterbium, and in 1866 wrote a histoncal review of spectrum analysis. He also studied the magnetic properties of iron and iron ores. 

An effective strategy of modifying the magnetic properties of iron-rich rare-earth intermetallics is to incorporate small interstitial atoms into the crystal lattice. Besides hydrogen, only boron, carbon, and nitrogen atoms are small enough to enter the structure in this way, and they preferentially occupy interstitial sites surrounded by the largest number of rare-earth atoms. For example, in... 

Sm2Fei7(iso-structural to S1112C017) there are three octahedral interstitial sites which may be filled by nitrogen atoms to form Sm2Fei7N3. The effect of interstitial atoms on the intrinsic magnetic properties of iron-based intermetallics can be further exploited in materials design. 

Soubeyroux, J.L., Fruchart, D., Isnard, O., Miraglia, S., Tomey, E. (1995) Role of the (H, C, N) interstitial elements on the magnetic properties of iron-rare earth permanent magnet alloys, J.Alloys Comp. 219, 16-24. 

Givord D., Givord F., Lemaire R. (1971) Magnetic properties of iron compounds with yttrium, lutetium and gadolinium. J. Phys. (Paris) 32, Cl-668. 

IVIagnetic circular dichroism (MCD) spectroscopy has been used extensively to examine the structural and magnetic properties of iron... 

The magnetic properties of iron salts have been the subject of a considerable amount of investigation.6... 

As an example, an iron - sulfur mixture can be separated by using the magnetic property of iron (Figure 6). 

The stmctural, electronic, biological, and magnetic properties of iron sulfur clusters in metalloproteins has been reviewed focussing particularly on [4Fe-4S ]"+ (n = 1-3) centres, and on synthetic [Fe3S4] and heterometallic [MFe3 S4] clusters. The chemistry and properties of aconitase have been reviewed in the context of its spectroscopic properties, structure, mechanistic function, and its relationship to the iron-regulatory protein. ... 

Many natural sphalerites contain substantial amounts of Fe " substituting for Zn + in the tetrahedral sites, and this system provides the opportunity to study a sulfide with increasing amounts of this transition metal. Detailed studies of the electrical and magnetic properties of iron-containing zinc sulfide by Keys et al. (1968) showed that a sphalerite with... 

In conclusion, we have demonstrated how it is possible to build up quite a detailed picture of the microstructure of the ionic phase of neutralized Nafion membranes by exploiting the magnetic properties of iron ions, and obtaining Mossbauer spectra at low temperatures in an external magnetic field. Results common to the two Mossbauer cations (Fe2+ and Fe +) concerning the anomalous character of the aqueous phase can reasonably be expected to apply for any other cation. The tendency or Fe3+ ions to form pairs and larger groups is not shared by Fe2, and it may be a special feature of small tripositive ions. 

The magnetic properties of iron are also dependent on purity and heat treatment. Up to 768 C... 

Tanaka, T., Tagawa, K., and Tazaki, A., Synthesis and magnetic properties of iron nitride particles, Nippon Kagaku Kaishi, 930 (1984). 

M. Pregelj, P. Umek, B. Drolc, B. Jancar, Z. Jaglicic, R. Dominko, and D. Arcon, Synthesis, structure, and magnetic properties of iron-oxide nanowires, J. Mater. Res., 21,2955-2962 (2006). 

J. Chatteijee, Y. Haik, C.J. Chen, Size dependent magnetic properties of iron oxide nanopaiticles. J. Magn. Magn. Mater. 257, 113-118 (2003)... 

Kim] Kim, E.C., Crystallographic and Magnetic Properties of Iron Sulfides Doped with 3d Transition Metals , J. Mater. Set Letter., 19, 693-694 (2000) (Experimental, Crys. Stmeture, Magn. Prop., 8)... 

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