Chemical ordering beyond the superstructure in long-range ordered systems

Abstract

To describe chemical ordering in solid solutions systems Warren-Cowley short-range parameters are ordinarily used. However, they are not directly suited for application to long-range ordered systems, as they do not converge to zero for large separations. In this paper, the theory is generalized to longrange ordered systems and chemical short-range order beyond the superstructure arrangements is discussed quantitatively on the example of a non-stoichiometric B2-ordered intermetallic alloy. Parameters of interatomic potentials are taken from an embedded atom method calculations and the degree of order is simulated by the Monte Carlo method. Both on-lattice and off-lattice methods, where the latter allows individual atoms to deviate from their regular lattice sites, were used, and the resulting effects are discussed.

Quantifying multi-point ordering in alloys

“…[8] Pair ordering alone would likely show a large tendency of unlike pair ordering between the cation and anion species. [44] III. APPLICATION TO PT-BASED ALLOY NANOSHELL CATALYST…”

Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism

“…Chemical order-disorder transformations in intermetallic alloys [1][2][3][4][5][6][7][8][9][10] such as Fe x Al 100-x and their effects on the physical properties [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] attracted steady interest through decades. In particular, the phenomenon of disorder-induced ferromagnetism [11][12][13][14][15][16][17][18][19][20] was extensively studied by employing various kinds of treatments that effectively induced the structural transitions from the chemically ordered (B2) to disordered (A2) state.…”