U(As1-xSex) Solid Solutions. II. New Magnetic Phase for 0.18<x<0.22
We further characterize the extra diffraction peaks reported for 0.18<x<0.22 in the U(As(1)-(x)Se(x)) solid solutions in the previous paper. A model based on the spin slip hypothesis is developed that suggests that a small volume (-1%) of the crystal can be characterized in the spin-addition state, i.e., the regular k = 1/2(++--) repeat is interrupted by compensating + and -"faults" that are inserted into the magnetic structure. The spacing between these faults is between 20 and 40 unit cells, depending on the temperature and composition, x. We suggest that these spin-addition volumes form the interfacial region between the high- temperature 3k and the low-temperature, 2k magnetic structures, both with k = 1/2.
Bibliographic Reference: An article published in: Physical Review B Condensed Matter. Vol.63 (2001) pp.134402-1 to 1344028-4
Record Number: 200013389 / Last updated on: 2001-06-27
Original language: en
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