Magnetism of crystalline and nanostructured ZnFe2O4

F. J. Burghart; W. Potzel; G. M. Kalvius; E. Schreier; G. Grosse; D. R. Noakes; W. Schäfer; W. Kockelmann; S. J. Campbell; W. A. Kaczmarek; A. Martin; M. K. Krause

doi:10.1016/S0921-4526(00)00394-X

Magnetism of crystalline and nanostructured ZnFe₂O₄

F. J. Burghart^*, W. Potzel, G. M. Kalvius, E. Schreier, G. Grosse, D. R. Noakes, W. Schäfer, W. Kockelmann, S. J. Campbell, W. A. Kaczmarek, A. Martin, M. K. Krause

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

66 Citations (Scopus)

Abstract

We have investigated the magnetic properties of three differently prepared samples of the spinel ZnFe₂O₄ with μSR, neutron diffraction, Moessbauer effect and magnetization measurements. Below T_N = 10.5 K, the first sample (annealed) shows long-range antiferromagnetic order in coexistence with short-range magnetic order. The second sample (rapidly quenched) shows only short-range magnetic order. The third sample (nanostructured with an average particle size of about 9 nm) exhibits ferromagnetism below T_c≈460 K combined with superparamagnetism. Below the blocking temperature of approximately 50 K the nanostructured sample exhibits a dependence on applied magnetic fields similar to that observed in spin glass systems. The roles of cation-site occupation and magnetic couplings in governing the different magnetic behaviors exhibited by the samples are discussed.

Original language	English
Pages (from-to)	286-290
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	289-290
DOIs	https://doi.org/10.1016/S0921-4526(00)00394-X
Publication status	Published - Aug 2000
Event	8th International Conference on Muon Spin Rotation, Relaxation and Resonance (muSR'99) - Les Diablerets, Switz Duration: 30 Aug 1999 → 3 Sept 1999

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title = "Magnetism of crystalline and nanostructured ZnFe2O4",

abstract = "We have investigated the magnetic properties of three differently prepared samples of the spinel ZnFe2O4 with μSR, neutron diffraction, Moessbauer effect and magnetization measurements. Below TN = 10.5 K, the first sample (annealed) shows long-range antiferromagnetic order in coexistence with short-range magnetic order. The second sample (rapidly quenched) shows only short-range magnetic order. The third sample (nanostructured with an average particle size of about 9 nm) exhibits ferromagnetism below Tc≈460 K combined with superparamagnetism. Below the blocking temperature of approximately 50 K the nanostructured sample exhibits a dependence on applied magnetic fields similar to that observed in spin glass systems. The roles of cation-site occupation and magnetic couplings in governing the different magnetic behaviors exhibited by the samples are discussed.",

author = "Burghart, {F. J.} and W. Potzel and Kalvius, {G. M.} and E. Schreier and G. Grosse and Noakes, {D. R.} and W. Sch{\"a}fer and W. Kockelmann and Campbell, {S. J.} and Kaczmarek, {W. A.} and A. Martin and Krause, {M. K.}",

year = "2000",

month = aug,

doi = "10.1016/S0921-4526(00)00394-X",

language = "English",

volume = "289-290",

pages = "286--290",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

note = "8th International Conference on Muon Spin Rotation, Relaxation and Resonance (muSR'99) ; Conference date: 30-08-1999 Through 03-09-1999",

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TY - JOUR

T1 - Magnetism of crystalline and nanostructured ZnFe2O4

AU - Burghart, F. J.

AU - Potzel, W.

AU - Kalvius, G. M.

AU - Schreier, E.

AU - Grosse, G.

AU - Noakes, D. R.

AU - Schäfer, W.

AU - Kockelmann, W.

AU - Campbell, S. J.

AU - Kaczmarek, W. A.

AU - Martin, A.

AU - Krause, M. K.

PY - 2000/8

Y1 - 2000/8

N2 - We have investigated the magnetic properties of three differently prepared samples of the spinel ZnFe2O4 with μSR, neutron diffraction, Moessbauer effect and magnetization measurements. Below TN = 10.5 K, the first sample (annealed) shows long-range antiferromagnetic order in coexistence with short-range magnetic order. The second sample (rapidly quenched) shows only short-range magnetic order. The third sample (nanostructured with an average particle size of about 9 nm) exhibits ferromagnetism below Tc≈460 K combined with superparamagnetism. Below the blocking temperature of approximately 50 K the nanostructured sample exhibits a dependence on applied magnetic fields similar to that observed in spin glass systems. The roles of cation-site occupation and magnetic couplings in governing the different magnetic behaviors exhibited by the samples are discussed.

AB - We have investigated the magnetic properties of three differently prepared samples of the spinel ZnFe2O4 with μSR, neutron diffraction, Moessbauer effect and magnetization measurements. Below TN = 10.5 K, the first sample (annealed) shows long-range antiferromagnetic order in coexistence with short-range magnetic order. The second sample (rapidly quenched) shows only short-range magnetic order. The third sample (nanostructured with an average particle size of about 9 nm) exhibits ferromagnetism below Tc≈460 K combined with superparamagnetism. Below the blocking temperature of approximately 50 K the nanostructured sample exhibits a dependence on applied magnetic fields similar to that observed in spin glass systems. The roles of cation-site occupation and magnetic couplings in governing the different magnetic behaviors exhibited by the samples are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0033688972&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(00)00394-X

DO - 10.1016/S0921-4526(00)00394-X

M3 - Conference article

SN - 0921-4526

VL - 289-290

SP - 286

EP - 290

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - 8th International Conference on Muon Spin Rotation, Relaxation and Resonance (muSR'99)

Y2 - 30 August 1999 through 3 September 1999

ER -

Magnetism of crystalline and nanostructured ZnFe₂O₄

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