Multiglass properties and magnetoelectric coupling in the uniaxial anisotropic spin-cluster-glass<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Ti</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>

Sharma, Shivani; Basu, Tathamay; Shahee, Aga; Singh, Kiran; Lalla, N. P.; Sampathkumaran, E. V.

doi:10.1103/physrevb.90.144426

Cited by 50 publications

(38 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The magnetodielectric (MD) response, defined as (H )/ (0)-1, is measured with T , as depicted in Fig. 4(a), and MD% value is consistent with some previously reported magnetodielectric materials [17,43]. We carefully note that the occurrence of MD does not involve magnetoresistance [44].…”

Section: Magnetodielectricsupporting

confidence: 87%

“…Compared to the SG, glassy dynamics involving electric dipole is rare and not well understood due to insufficient studies [5][6][7][8]. Recently, the multiglass scenario has been proposed in a few oxides and provided a new paradigm of glassiness in the dynamics of electric dipole [9][10][11][12][13][14][15][16][17][18][19][20]. In a majority of the cases glassiness in the electric dipole was proposed from the non-Arrhenius frequency response of freezing temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetoelectric memory in reentrant frozen state and considerable ferroelectricity in the multiferroic spin-chain compound Sm2BaNiO5

et al. 2017

View full text Add to dashboard Cite

We report intrinsic memory effect in magnetization and dielectricity for the spin-chain compound Sm 2 BaNiO 5 , pointing the cooperative glassy response below ∼8 K. Signature of anomaly around 8 K is verified by the magnetization, heat capacity, dielectric permittivity, magnetostriction, and structural parameters as obtained from the synchrotron diffraction studies. Intriguingly, the memory effect is observed well below the magnetic and ferroelectric ordering temperatures, pointing to a reentrant frozen state. Ferroelectricity emerges above antiferromagnetic Néel temperature at 45 K. For 4.5 kV/cm poling field the spontaneous electric polarization attains the value of 1300 μC/m 2 , that is the highest value in the R 2 BaNiO 5 series. Synchrotron diffraction studies confirm that ferroelectricity emerges due to structural transition from the centrosymmetric I mmm to a noncentrosymmetric I mm2 space group. Magnetoelectric coupling is significant and scales linearly to the squared magnetization as described by the Ginzburg-Landau theory.

show abstract

Section: Magnetodielectricsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Magnetoelectric memory in reentrant frozen state and considerable ferroelectricity in the multiferroic spin-chain compound Sm2BaNiO5

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Additionally, there is a shoulder in ɛʹ and a tendency for a peak in tanδ around 100 K, for instance, for 10 kHz, and these features move dramatically to a higher-T with increasing ν (for instance to about 150 K for 100 kHz). Such a strong dispersion characteristic of relaxor ferroelectrics can be attributed to polar nano-regions 13,14 . It appears that this family of compounds is prone for some degree of sitedisorder 6 , which could facilitate the development of such nano-regions.…”

mentioning

confidence: 99%

Implications of magnetic and magnetodielectric behavior of GdCrTiO5

Basu

Singh

Gohil

et al. 2015

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

We have carried out dc magnetization (M), heat-capacity (C) and dielectric studies down to 2K for the compound GdCrTiO5, crystallizing in orthorhombic Pbam structure, in which well-known multiferroics RMn2O5 (R= Rare-earths) form. The points of emphasis are: (i) The magnetic ordering temperature of Cr appears to be suppressed compared to that in isostructural Nd counterpart, NdCrTiO5, for which the Neel temperature is about 21 K. This finding on the Gd compound suggests that Nd 4f orbital plays a role on the magnetism of Cr in contrast to a proposal long ago. (ii) Dielectric constant does not exhibit any notable feature below about 30 K in the absence of external magnetic field, but a peak appears and gets stronger with the application of external magnetic fields, supporting the existence of magnetodielectric coupling. (iii) The dielectric anomalies appear even near 100 K, which can be attributed to short-range magnetic-order. We also observe a gain in spectral weight below about 150 K in Raman spectra in the frequency range 150 to 400 cm-1, which could be magnetic in origin supporting short-range magnetic order. It is of interest to explore whether geometrically frustration plays any role on the dielectric properties of this family, as in the case of RMn2O5.Comment: 15 pages, 6 figures, manuscript submitte

show abstract

“…It is also possible that magnetic and electric dipole dynamics are different, despite exhibiting MDE coupling. The reason is that similar inferences have made by us in some other families as well in recent years, [15][16][17] where the magnetoelectric coupling is strong. We have tried to look for ferroelectricity observed for heavy rare-earth members; 4,6,8 however, we could not detect the same (that is, remnant polarization and its reversibility of sign with opposite poling by electric field by measuring pyroelectric current) in this compound.…”

mentioning

confidence: 93%

Magnetic and magnetodielectric coupling anomalies in the Haldane spin-chain system Nd2BaNiO5

et al. 2015

Self Cite

View full text Add to dashboard Cite

We report the magnetic, heat-capacity, dielectric and magnetodielectric (MDE) behaviour of a Haldane spin-chain compound containing light rare-earth ion, Nd 2 BaNiO 5 , in detail, as a function of temperature (T) and magnetic field (H) down to 2 K. In addition to the well-known long range antiferromagnetic order setting in at (T N =) 48 K as indicated in dc magnetization (M), we have observed another magnetic transition near 10 K; this transition appears to be of a glassy-type which vanishes with a marginal application of external magnetic field (even H= 100 Oe). There are corresponding anomalies in dielectric constant (ɛ') as well with variation of T. The isothermal M(H) curves at 2 and 5 K reveal the existence of a magnetic-field induced transition around 90 kOe; the isothermal ɛ'(H) also tracks such a metamagnetic transition. These results illustrate the MDE coupling in this compound. Additionally, we observe a strong frequency dependence of a step in ɛ'(T) with this feature appearing around 25-30 K for the lowest frequency of 1 kHz, far below T N . This is attributed to interplay between crystal-field effect and exchange interaction between Nd and Ni, which establishes the sensitivity of dielectric measurements to detect such effects. Interestingly enough, the observed dispersions of the ɛ'(T) curves is essentially H-independent in the entire Trange of measurement, despite the existence of MDE coupling, which is in sharp contrast with other heavy rare-earth members in this series.

show abstract

Multiglass properties and magnetoelectric coupling in the uniaxial anisotropic spin-cluster-glassFe2TiO5

Cited by 50 publications

References 46 publications

Magnetoelectric memory in reentrant frozen state and considerable ferroelectricity in the multiferroic spin-chain compound Sm2BaNiO5

Magnetoelectric memory in reentrant frozen state and considerable ferroelectricity in the multiferroic spin-chain compound Sm2BaNiO5

Implications of magnetic and magnetodielectric behavior of GdCrTiO5

Magnetic and magnetodielectric coupling anomalies in the Haldane spin-chain system Nd2BaNiO5

Contact Info

Product

Resources

About