Anomaly magnetic

NISCO (National Iranian Steel Corporation), 1980. Report on result of search and evaluation works at magnetic anomalies of the Bafq iron ore region during 1976-1979. Unpublished internal report, 260 p. 

Ruby S.L. Shirane, G. (1961) Magnetic anomaly in the FeTiOs-a- Fe203 system by Moss-bauer effect. Phys. Rev. 123 1239-1240... 

As may be seen from the indications above the interpretation of magnetic anomalies as caused by magnetic interactions is not at all quite clear-cut. Fortunately neutron diffraction simplifies matter as it provides a definite proof of those interactions that are cooperative all over the crystal structure and detectable therefore because of spin alignment within magnetic sublattices. Such proofs are missing up to now for the higher fluorides, however. The break-down of Hund s rule for the 4d-and 5i-ions, in most fluorides of which even the weak-field ligand fluorine causes low-spin behaviour, may account for this as well as the different nature of interactions assumed instead. 

Figure 5. The increase of rank of coal (on the basis of vitrite analyses) towards the magnetic anomaly near Bramsche. kru = Weatden (Lower Cretaceous) kroi = Cenomanian krot = Upper Campanian (Upper Cretaceous). The numbers at the margin of the map indicate the numbers of the single topographic maps 1 25 000...

The Bannock seamount is located between the Island of Malta and the Pantelleria graben. It rises from a depth of about 1 km reaching 230 m below sea level. In spite of its conical shape, there are doubts about the volcanic nature of this seamount, since no magnetic anomalies have been detected. 

PrRu4Pi2 exhibits an unusual metal-insulator transition (M-I) at about 60 K (fig. 15) (Sekine et al., 1997). There is no magnetic anomaly associated with this transition and originally it was thought there is no structural change associated with the M-I. A small struc-... 

A highly accurate value for the /i can also be obtained from the zero field splitting Avhfs- Using the fine structure constant a derived from the magnetic anomaly of the electron, one finds... 

This value depends strongly on the correctness of the theory both for the muonium hyperfine structure and the electron magnetic anomaly. Alternatively, extracting a value for a from Avhfs instead represents a most valuable stringent consistency test for different branches of physics, which each allow to obtain a precise value of a (see Fig.3). 

Fig. 4. The fine structure constant a has been determined with various methods [25-28]. most precise is the determination from the magnetic anomaly of the electron. The muonium atom offers two different routes which uses independent sets of fundamental constants. The disagreement (the error bars are mostly statistical) seem to indicate that the value h/me from neutron de Broglie wavelength measurements may be quoted with too high accuracy...

At present the good agreement within two standard deviations between the fine structure constant determined from muonium hyperfine structure and the one from the electron magnetic anomaly is generally considered the best test of internal consistency of QED, as one case involves bound state QED and the other one QED of free particles. 

Fig. 9. The spectroscopic experiments on the hyperfine structure of muonium and the Is-2s energy interval are closely related to a precise measurement of the muon muon magnetic anomaly. The measurements put a stringent test on the internal consistency of the theory of electroweak interaction and on the set of the involved fundamental constants...

Similar magnetic anomalies are associated with another chain compound [Cu(terpy)L][C104]2 (L = pyrazine), incorporating bridging pyrazine groups once again a five-coordinate structure is proposed ISO). The five-coordinate square-pyramidal geometry is also observed in the structurally characterized complex [Cu(terpy)(0N0)(H20)][N02] H20 (9). 

The rocks of the Krivoy Rog-Kremenchug zone, of the Kursk group in the Kursk Magnetic Anomaly (KMA), of the Animikie group of Lake Superior, and of the Hamersley formation in Australia are dated to 1700-2000 m.y. 

Magnetite-siderite rocks are very common in the section of the iron-ore sequence of the Krivbass (Krivoy Rog basin) and of numerous magnetic anomalies of the Ukrainian shield. Such rocks also occur in the KM A, in the Lake Superior and other areas of slightly metamorphosed BIF. The presence of excess magnetite does not affect further metamorphic transformations of siderite, which proceed as in pure carbonate iron-formations. 

Gusel nikov, V.N., 1972. Genetic Problems of the Iron Formations of the KMA [Kursk Magnetic-Anomaly]. Izd. Nauka, Moscow, 228 pp. (in Russian). 

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