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Titolo:
SPIN-GLASS BEHAVIOR OF AMORPHOUS FE-5(INTE4)(3)
Autore:
ZHANG JH; WILLIAMS D; TAO CH; OCONNOR CJ;
Indirizzi:
XAVIER UNIV,DEPT CHEM NEW ORLEANS LA 70125 UNIV NEW ORLEANS,DEPT CHEM NEW ORLEANS LA 70148
Titolo Testata:
Journal of applied physics
fascicolo: 8, volume: 79, anno: 1996,
parte:, 2B
pagine: 6627 - 6629
SICI:
0021-8979(1996)79:8<6627:SBOAF>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
6
Recensione:
Indirizzi per estratti:
Citazione:
J.H. Zhang et al., "SPIN-GLASS BEHAVIOR OF AMORPHOUS FE-5(INTE4)(3)", Journal of applied physics, 79(8), 1996, pp. 6627-6629

Abstract

The amorphous phases of Cr-5(InTe4)(3) and Fe-5(InTe4)(3) have been prepared via the precipitation reaction of the Zintl polyanion InTe4-5 with Cr3+ and Fe3+ in aqueous solution, respectively. Their magnetic and conducting properties have been examined as a function of temperature. The high-temperature susceptibility of Cr-5(InTe4)(3) follows the Curie-Weiss law with theta=-30.2 K and C=1.65 emu/mole Cr atom. Cr-5(InTe4)(3) has a conductivity of 1.07x10(-3) Omega(-1) cm(-1) at 300 K and is a semiconductor with Ea=0.20 eV. Fe-5(InTe4)(3) exhibits relatively high conductivity due to partial delocalization of electrons. Its conductivity is 7.41 Omega(-1) cm(-1) at 300 K, and shows little temperature dependence. Fe-5(InTe4)(3) obeys the Curie-Weiss law at high temperatures with theta=-26.3 K and C=1.60 emu/mole Fe atom, and undergoes a transition to a spin glass state at 6.0 K. The spin glass state has been characterized by an analysis of the field and temperature dependence of the thermal remanent magnetization and isothermal remanent magnetization. The hysteresis loops measured at 2.0 K under field-cooling and zero-field-cooling conditions reveal the presence of a small unidirectional exchange interaction. (C) 1996 American Institute of Physics.

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Documento generato il 20/09/20 alle ore 07:57:04