Anomaly in susceptibility

Microwave conductivities have only been obtained for the p and p" phases, because in the other cases one is not in the anomalous skin depth regime. The calculated conductivity for the p phase increases monotonically to low temperatures, by a factor of from 100 K to 4 K, while the P" phase shows a constant value from room temperature to 50 K. Below 50 K the conductivity increases to a maximum at - 30 K, where the anomaly in susceptibility is observed. This, however, contrasts with the resistive measurements, which indicate the transition to be at a lower temperature ( -8 K) [13]. 

We conclude this summary by pointing to the anomalies in the magnetic susceptibility as a function of temperature and, at low temperature, as a function of an applied magnetic field. In the low-field susceptibility of the hexagonal plane, we observe a maximum around Tmax 15 K, whereas the... 

Continuous phase transitions show anomalies in the specific heat and magnetic susceptibility (or magnetization) at or very near Tg. There is, however, no latent heat as in so-called first-order transitions but of course there is a decrease in spin entropy. 

Spin susceptibility. The absence of any anomaly in the spin susceptibility near and its temperature variation can also be accounted for in the one-dimensional... 

The lowest curve does not show any anomaly in the susceptibility behavior as the temperature (T = 4.0) is too high in comparison with the magnetic field. 

Fig. 15 Magnetic susceptibility anomalies in paramagnetic XY-ordered JT crystals...

Specific heat measurements on single crystals revealed a sharp peak at 7 K accompanied by two small anomalies at 4.6 and 7.6 K (Andres et al. 1978). It was conjectured that these anomalies are driven by quadrupolar interactions between the U ions. This mechanism can also account for anomalies in the magnetic susceptibility and the thermal expansion (increase of c/a ratio on cooling) observed at relevant temperatures on a single crystal by Ott et al. (1980). Dilution experiments on Uj Th Pdj point to an increase of jaeff/U atom for x > 0.9 reaching a value of 3.55/xB (Wemick et al. 1965). 

For irradiations A-Il, A-II2, B-I and C on PP fibers, no significant dependence of RO resonance line shape parameters (g value, resonance line width, resonance line shape) except resonance line intensity is observed. Under these circumstances, the temperature dependence of s.s. is anomalous and cannot be simple correlated to Curie, Curle-Welss or even exclton spin susceptibility. In the case of A-11 irradiation a weak Increase of s.s. associated to ROa centers is observed eu ound Tq (Figure 2). As the Integral dose Is Increased, the nun er of RO centers Increases and the anomaly In s.s. around Tq is enhanced, as may be observed in Figure 3. After a B-1 irradiation, the anomaly observed in the temperature dependence of s.s. is dramatic, as may be observed in Figure 4. As C-1 irradiation is limited to few MRads, the anomaly in the s.s. dependence on temperature is spectacular, but the anomaly in s.s. around Tq is not further enhanced. 

In conclusion, s.s. dependence on temperature, for gamma irradiated PP is cuiomalous around Tq, due to an a-nomaly in oxygen diffusion across the glassy transition region. However, as RO concentration depends on time and temperature and because we have no reason to suppose a particular type of spin susceptibility dependence on temperature, is not possible to convert s.s. dependence on temperature in the dependence of RO concentration on temperature. For usual Curie or Curie-Weiss spin susceptibility dependence on temperature, the anomaly reported by us is a true anomaly in the number of RO, centers. 

The CeCuj orders antiferromagnetically at = 3.8 K, showing a structure in the specific heat jump at 4 K. This double transition is also seen in thermal expansion and in magnetic susceptibility measurements at 3.6 and 3.8 K, respectively. The entropy associated with both transitions is approximately Rln2 and 7lt = 50 mJ K /Ceatom (Willis et al. 1987). The temperature dependence of C at T second-order transition, furthermore, the cusp observed at and the strong anomaly in the thermal expansion suggest such a... 

For perovskites that are used in high-temperature applications, such as solid oxide fuel cells that operate above 800°C or so, thermal expansion becomes an important physical property, as mismatch of the thermal expansion of the cell components, cathode, electrolyte and anode, will cause early cell failure. The magnitude of the thermal expansion of many perovskites is rooted in the thermal behaviour of the BXg octahedra and is associated with octahedral tilt, distortion and the bonding between the B-cation and the surrounding anions. These are all susceptible to modification as the temperature rises and can contribute to anomalies in thermal expansion characteristics. 

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