Magnetic phase diagrams of diluted B-spinel AxA′1−xB2X4: a study through XY model

Hachimi, M.; Hamedoun, M.; Bakrim, H.; Hourmatallah, A.; Elachheb, Z.; Ajana, L.

doi:10.1016/s0304-8853(02)00976-9

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Calculation Of the Values Of The Exchange Integrals1

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2011

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“…P (n, n) = C n 6 x 6−n (1 − x) n and the exchange integral for such an occupation is assumed to be: J n AA = (J 6−n A J n A ) 1 6 . The expression obtained is [6]:…”

Section: Calculation Of the Values Of The Exchange Integralsmentioning

confidence: 99%

Study of Magnetic Properties in Spinels Co x Zn1−x Cr2O4 systems

Masrour

Elegrini

Hamedoun

et al. 2011

J Supercond Nov Magn

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The exchange interactions J AA (x) and J AB (x) are calculated by using a probability law for the Co x Zn 1−x Cr 2 O 4 . The magnetic properties of a diluted ferromagnetic spinels Co x Zn 1−x Cr 2 O 4 system are investigated by using the high-temperature series expansions combined with the Padé approximants. The magnetic phase diagram, i.e., T N versus x, and the critical exponent associated with the magnetic susceptibility (γ ) are deduced.Keywords High-temperature series expansions · Padé approximant · Exchange interaction · Magnetic phase diagram · Critical exponent R. Masrour ( ) Laboratory of Materials, Processes, Environment and Quality,

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“…P (n, n) = C n 6 x 6−n (1 − x) n and the exchange integral for such an occupation is assumed to be: J n AA = (J 6−n A J n A ) 1 6 . The expression obtained is [6]:…”

Section: Calculation Of the Values Of The Exchange Integralsmentioning

confidence: 99%