The hard layer thickness has great effect on the hysteresis loops only when the thickness is very small, where the hysteresis loop is nearly square and the dominant coercivity mechanism is the nucleation. The thickness regions at which the theoretical and practical giant energy products can be achieved
this website have been discussed. In most cases, the hard layer can be taken as sufficiently thick so that the magnetization at its surface obeys a simple coherent rotation model. In these cases, the calculation can be simplified significantly, with only the influence of the soft layer thickness accounted. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3506693]“
“Three novel polyimides (PIs) having pendent 4-(quinolin-8-yloxy) aniline group were
prepared by polycondensation of a new diamine with commercially available tetracarboxylic dianhydrides, such as pyromellitic dianhydride, 3,3′,4,4′-benzophenone tetracarboxylic dianhydride, and bicyclo[2.2.2]-oct-7-ene-2,3,5,6-tetracarboxylic dianhydride. These PIs were characterized by FTIR, (1)H NMR, and elemental analysis; they had high yields with inherent viscosities in the range of 0.4-0.5 dl g(-1), and exhibited excellent solubility in many organic solvents such as N,N-dimethyl acetamide, N,N’-dimethyl A-769662 solubility dmso formamide, N-methyl pyrrolidone (NMP), dimethyl sulfoxide, and pyridine. These PIs exhibited glass transition temperatures (T(g)) between 250 and 325 degrees C. Their initial decomposition temperatures (T(i)) ranged between 270 and 450 degrees C, and 10% weight loss temperature (T(10)) up to 500 degrees C with 68% char yield at 600 degrees C under nitrogen atmosphere. Transparent
and hard polymer films were obtained via casting from their NMP solutions. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 983-988, 2011″
“It is possible and clinically relevant to distinguish between slow and rapid progressive spermatozoa in basic semen analysis. This is discussed in light of the different purposes of semen analysis for the subfertile couple and the male patient. The two groups of progressive spermatozoa should be distinguished to help ensure that pertinent information available in the semen find more sample is not neglected.”
“We present a comprehensive study of the magnetic properties for La doped Bi2FeMnO6 (LBFM) ceramic and film which was first deposited on (100) SrTiO3 substrate by pulsed laser deposition method. The LBFM film is antiferromagnetic or weak ferrimagnetic at room temperature and it shows clear magnetic anisotropy. But it is not sure whether the spin-glass behavior is present in LBFM film because of the influence from substrate. Compared to the film, LBFM ceramic shows different magnetic properties. It has a lower T-N and all the observations indicate that LBFM ceramic shows spin-glass behavior. (C) 2010 American Institute of Physics. [doi:10.1063/1.