caa a22 4500 463215613 CHVBK 20180405153155.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3892-1 doi (NATIONALLICENCE)springer-10.1007/s00339-007-3892-1 Zn-doping effect on the energy barrier to magnetization reversal in superparamagnetic nickel ferrite nanoparticles [Elektronische Daten] [J.T. Elizalde Galindo, A.H. Adair, C.E. Botez, V. Corral Flores, D. Bueno Baques, L. Fuentes Cobas, J.A. Matutes-Aquino] Measurements of ac-susceptibility and dc-magnetization were carried out on samples of Ni1-xZnxFe2O4 nanoparticles (x=0, 0.25, 0.5, 0.75) with average diameters 〈D〉≈7nm. Values of the superparamagnetic blocking temperature T̄B were obtained from the characteristic temperature behavior of the imaginary susceptibility χimag. An Arrhenius-type law, which accurately describes the relationship between the observation time τobs and the blocking temperature, was used to determine the effective energy barrier to magnetization reversal Ueff. A Zn-content dependence of the energy barrier is observed, where Ueff changes little for 0≤x≤0.25, it peaks at x=0.5, and decreases back upon further Zn-doping. The large increase of Ueff at x=0.5 is attributed to an enhanced magnetic anisotropy induced by the crossover between two spatial arrangements of spins in the A and B sub-lattices of the ferrimagnetic inverse spinel. Springer-Verlag, 2007 Elizalde Galindo J.T. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut Adair A.H. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut Botez C.E. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut Corral Flores V. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut Bueno Baques D. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut Fuentes Cobas L. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut Matutes-Aquino J.A. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut Applied Physics A Springer-Verlag 87/4(2007-06-01), 743-747 0947-8396 87:4<743 2007 87 339 https://doi.org/10.1007/s00339-007-3892-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3892-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Elizalde Galindo J.T. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut NATIONALLICENCE 700 1- Adair A.H. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut NATIONALLICENCE 700 1- Botez C.E. Department of Physics, University of Texas at El Paso, 500 W. University Avenue, 79968, El Paso, TX, USA aut NATIONALLICENCE 700 1- Corral Flores V. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut NATIONALLICENCE 700 1- Bueno Baques D. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut NATIONALLICENCE 700 1- Fuentes Cobas L. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut NATIONALLICENCE 700 1- Matutes-Aquino J.A. Centro de Investigación en Materials Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31120, Chihuahua, Mexico aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/4(2007-06-01), 743-747 0947-8396 87:4<743 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer