Magnetic susceptibility temperature-independent

CrN 300-100 3.9 Gouy at room temperature magnetic transition observed near 7i=273 K, below susceptibility temperature independent 73W5, Fig. 51... 

Neptunium dioxide crystallizes in the cubic fluorite structure and magnetic measurements have been reported from 4 to 300 K [16,74,75]. There is a magnetic transition at 2S.4K. Above 60 K, the susceptibility follows the Curie-Weiss law pgn = 2.95-3.00/ig, 0 = —22 K). Below 10-12 K, the magnetic susceptibility becomes independent of temperature (xm = ... 

In his thesis (1895) Pierre Curie [64] investigated the magnetic properties of a number of different materials. He found that the magnetic susceptibility is independent of temperature for diamagnetic materials. For paramagnetic materials (like oxygen) he found a relation of the type of Eq. (5). A different relation... 

The magnetic susceptibility of Na[Pu02(CH3COO)3] was measured by Dawson between 90 and 333 K (3). The resulting magnetic moment, yjff = 8.0 Ug, is temperature independent and corresponds to = 8.70 Ug, which is calculated from EPR measurements on a... 

Magnetic measurements of PuFi, between 4.2 and 300 K are consistent at high temperatures with older measurements (10-12). The large temperature dependent diamagnetism observed earlier was not found. Up to 100 K the susceptibility is nearly temperature independent with a value of X ip 2940 x 10-6 emu. The Curie-Weiss behavior near room temperature indicates population of a higher first excited state. The structure of PuFi, is isomorphic with that of UFi, (13), where two different sets of actinide atoms are 8-fold coordinated by a distorted antiprism. 

With respect to the physical properties mentioned, band-structure calculations have attracted considerable interest, e.g., for SbSBr, SbSI, and SbSel (234). For the compounds having reference 22i in column 4 of Table XXIX, a temperature-independent diamagnetism has been found, with values of about 10 cm" g between 77 and 340 K. A small temperature-dependence is exhibited by BiTel, a narrow-gap semiconductor (41). The anisotropy of the magnetic susceptibility has been studied for SbSI, BiSel, and BiTel (41, 420). 

Variable-temperature measurements of the magnetic susceptibility at 0.1 and 1.0 T between 2 and 290 K indicated temperature-independent diamagnetism 44). That is, flat % versus T curves, for both 3 (Xdiayrip(3) =-10.2 X lO emumor ) and 4 (Xdia/Tip(4) =-9.8 x 10 emu mol were obtained. By comparison these numbers for the... 

The above statements apply to an assembly of independent spins. Deviation from proportionality, if any is observed, suggests the presence of cooperative magnetic phenomena, i.e. ferro-, antiferro-, ferri-, meta-, micto-magnetism, and so on. The magnetic susceptibility at above the spinordering temperature (Tq) can be usually fitted by the Curie-Weiss expression (18) with the Weiss temperature 0 > 0 for the sample with dominant... 

Diamagnetism is a basic property of all substances and involves a slight repulsion by a magnetic field. The magnetic susceptibility of a diamagnetic substance is small (-10 ), negative and independent of temperature. Iron oxides display additional types of magnetism. 

Another additive term in the magnetic susceptibility arises from the temperature-independent core diamagnetism of all the ions in a solid. For YBa2Cu307 the core diamagnetism is approximately -2 x 10 7 based on a calculation using Pascal s constants (9). This small negative contribution serves to reduce the total susceptibility. A third possible contribution arises from Van Vleck paramagnetism (10) caused by excited states in the atoms of the... 

Rhenium metal exhibits a very low paramagnetism which is field-independent and almost temperature-independent. In the range 79—471 K, magnetic susceptibility data for two independent samples were shown to correspond, when Tis in Kelvin, to the following equations (5) ... 

---