Random-field-induced spin-glass-like behavior in the diluted Ising antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>0.31</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Zn</mml:mi></mml:mrow><mml:mrow><mml:mn>0.69</mml:mn></mml:mrow></

Montenegro, F. C.; King, A. R.; Jaccarino, V.; Sj, Han; Belanger, D. P.

doi:10.1103/physrevb.44.2155

Cited by 64 publications

(25 citation statements)

References 19 publications

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“…In the case of YVO 3 , Massa et al [35] suggested that the presence of faulty orbitals in the material is connected with lattice inhomogeneity. A model of inhomogeneity with RF spins was also supported in the case of PrVO 3 where one can observe the staircase-like hysteresis loop and spin glass-like behaviour of the ZFCFC curves [18] which are similar to those seen in some diluted antiferromagnet Ising systems [36,37]. For [25], YbVO 3 [26] are not in conflict with this scenario.…”

Section: Iv-discussionmentioning

confidence: 50%

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

2007

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Abstract:We report on a study of various RVO 3 single-crystal samples (R = La, Nd, Sm, Gd, Er and Y) which show temperature-induced magnetization reversal. For compounds with lighter rare-earths (R = La, Nd and Sm), magnetization reversal can be observed for magnetic field applied in the ab plane and along the c axis, whereas for the heavy rare-earths (R = Gd, Er) magnetization reversal is only observed when the field is applied along the a axis. YVO 3 has a magnetization reversal along all the main crystallographic axes in a modest applied field. We have found that some compounds are very sensitive to small trapped fields present in the superconducting solenoid of the magnetometer during the cooling. Based on the observed results, we argue that inhomogeniety caused by defects in the orbital sector in the quasi onedimensional orbital systems could account for the unusual magnetization reversal.

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Section: Iv-discussionmentioning

confidence: 50%

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

2007

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“…This state has been identified with an intermediate spin glass phase, characterized by dynamical freezing and lack of long range antiferromagnetic order [189,15]. From an experimental point of view (as well as for Monte Carlo simulations [202]) it is still not clear, whether this intermediate regime corresponds to an equilibrium phase.…”

Section: Random Field Systemsmentioning

confidence: 99%

Monte Carlo Studies of Ising Spin Glasses and Random Field Systems

Rieger

1995

Annual Reviews of Computational Physics II

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We review recent numerical progress in the study of finite dimensional strongly disordered magnetic systems like spin glasses and random field systems. In particular we report in some details results for the critical properties and the non-equilibrium dynamics of Ising spin glasses. Furthermore we present an overview over recent investigations on the random field Ising model and finally of quantum spin glasses.

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“…This change of curvature in T eq vs. H was first observed [20] by magnetization measurements in F e 0.31 Zn 0.69 F 2 . Faraday rotation [6] and neutron scattering [21] experiments on a sample with the same x, confirmed the REIM to RFIM crossover scaling at low H and the lack of stability of the AF LRO at large H, giving way to a random-field induced glassy phase in this highly diluted compound. Recent magnetization measurements indicated that similar structure in the phase diagram exists at very high fields for samples with higher values of x [11,12].…”

mentioning

confidence: 62%

“…This behavior is consistent with clusters coexisting with long range order below T N . A similar glassy low temperature region has been identified [6,20,28] in the anisotropic system F e 0.31 Zn 0.69 F 2 using magnetization and dynamic susceptibility measurements. However, the broad line shapes that indicate the glassy behavior were not observed in F e 0.31 Zn 0.69 F 2 with neutron scattering techniques [21].…”

mentioning

confidence: 98%

Ordering in the dilute weakly anisotropic antiferromagnetMn0.35Zn0.65F

et al. 2000

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The highly diluted antiferromagnet M n0.35Zn0.65F2 has been investigated by neutron scattering in zero field. The Bragg peaks observed below the Néel temperature (TN ≈ 10.9 K) indicate stable antiferromagnetic long-range ordering at low temperature. The critical behavior is governed by random-exchange Ising model critical exponents (ν ≈ 0.69 and γ ≈ 1.31), as reported for M nxZn1−xF2 with higher x and for the isostructural compound F exZn1−xF2. However, in addition to the Bragg peaks, unusual scattering behavior appears for |q| > 0 below a glassy temperature Tg ≈ 7.0 K. The glassy region T < Tg corresponds to that of noticeable frequency dependence in earlier zero-field ac susceptibility measurements on this sample. These results indicate that long-range order coexists with short-range nonequilibrium clusters in this highly diluted magnet.

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Random-field-induced spin-glass-like behavior in the diluted Ising antiferromagnetFe0.31Zn0.69

Cited by 64 publications

References 19 publications

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

Monte Carlo Studies of Ising Spin Glasses and Random Field Systems

Ordering in the dilute weakly anisotropic antiferromagnetMn0.35Zn0.65F

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