Spin-glass dynamics in interacting nanoparticle system La0.7Ca0.3MnO3 obtained by mechanochemical milling

Perović, M.; Mraković, Ana; Kusigerski, Vladan; Blanuša, J.; Spasojević, Vojislav

doi:10.1007/s11051-011-0588-4

Cited by 13 publications

(13 citation statements)

References 19 publications

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“…Scaling of the relaxation curves gave the value s 0 ¼ 10 À13 s, which was in agreement with the value deduced by fitting AC susceptibility data to both VogeleFulcher (s 0 ¼ 10 À12 s) and power laws (s 0 ¼ 1.5$10 À13 s) [8].…”

Section: Resultssupporting

confidence: 87%

“…SSG behaviour of this system was confirmed by revealing typical experimental signatures (fingerprints) of cooperative behaviour through DC ZFC/ FC memory effect and AC susceptibility measurements [8]. Transmission electron microscopy (TEM) confirmed the existence of large grains formed by agglomeration of well-crystallized single nanoparticles.…”

Section: Introductionmentioning

confidence: 65%

“…Details on the synthesis of studied nanoparticle La 0.7 Ca 0.3 MnO 3 as well as detailed investigation of its structural and magnetic properties can be found in our previous articles [7,8]. SSG behaviour of this system was confirmed by revealing typical experimental signatures (fingerprints) of cooperative behaviour through DC ZFC/ FC memory effect and AC susceptibility measurements [8].…”

Section: Introductionmentioning

confidence: 82%

“…In this article we report the results of the low temperature time dependent magnetic phenomena investigation, which represents a continuation of the systematic study on magnetic properties of the mechanochemically obtained nanosized manganite La 0.7 Ca 0.3 MnO 3 [7,8]. Research on relaxation phenomena in a system where significant dipolar interactions between nanoparticles exist, represents contribution to the current efforts in understanding low temperature spin glass like behaviour in nanoparticle manganites [1,6,9].…”

Section: Introductionmentioning

confidence: 99%

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Relaxation phenomena in super spin glass nanoparticle manganite La0.7Ca0.3MnO3

Perović

Mraković

Kusigerski

et al. 2012

Materials Chemistry and Physics

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relaxation phenomena in super spin glass nanoparticle manganite La0.7Ca0.3MnO3

Perović

Mraković

Kusigerski

et al. 2012

Materials Chemistry and Physics

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“…The value of ϕ is about an order of magnitude smaller than that describing the dynamics of noninteracting superparamagnetic particles, though it is consistent with values obtained from spin glasses [12]. However, it is also possible that the value for ϕ obtained for Ni(TCNQ − D 4 ) 2 may be a consequence of interactions between superparamagnetic particles [43].…”

Section: Parametersupporting

confidence: 83%

Separating the ferromagnetic and glassy behavior within the metal-organic magnetNi(TCNQ)2

et al. 2015

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Publisher's copyright statement:Reprinted with permission from the American Physical Society: Physical Review B 92, 184431 c 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modied, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. An in-depth study of the metal-organic magnet Ni(TCNQ) 2 was conducted where the deuterated form was synthesised both to attempt to alter the magnetic properties of the material and to be advantageous in techniques such as neutron scattering and muon spectroscopy. Deuteration saw a 3 K increase in T C with magnetization and heat capacity measurements demonstrating a spin wave contribution at low temperatures confirming the 3D nature of the ferromagnetic state shown by Ni(TCNQ − D 4 ) 2 . AC susceptibility results suggest there is a glassy component associated with the magnetically ordered state, though muon spectroscopy measurements did not support the presence of a spin glass state. Instead muon spectroscopy at zero magnetic field indicated the presence of two magnetic transitions, one at 20 K and another below 6 K; the latter is likely due to the system entering a quasistatic regime, similar to what one might expect of a superspin or cluster glass. Neutron diffraction measurements further supported this by revealing very weak magnetic Bragg peaks suggesting that the magnetism may have a short coherence length and be confined to small grains or clusters. The separation of the ferromagnetic and glassy magnetic components of the material's properties suggest that this system may show promise as a metal-organic magnet which is easily modified to change its magnetic properties, providing larger grain sizes can be synthesized.

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