Significant magneto-elastic coupling at Griffiths-like phase boundaries in low dimensional oxides, ASb₂O₆ (A = Ni and Mn)

Abstract

The compounds, NiSb2O6 (NSO) and MnSb2O6 (MSO) attract the community for the quasi one-dimensional and layered structure composed of Ni2+ and Mn2+, which orders antiferromagnetically at T N = 6.7 and 12 K, respectively. Here, we report the Griffiths-like phase much above T N in the range of 37–85 K and 25–80 K for NSO and MSO, respectively. The dc magnetization results indicate the Griffiths-like phase, following the modified Curie–Weiss law. The magneto-capacitive responses for both the compounds show anomalies at the onset of the Griffiths-like phase. Intriguingly, the low temperature synchrotron diffraction results are conclusive for determining the singularities for both the compounds. Interplay between the low-dimensionality, magnetic frustration, and magneto-elastic coupling correlates the observed short range ordered state, which is suggested as a Griffiths-like phase, above T N for both the compounds.

Structural correlation to ferroelectric order, non-Griffiths like phase and magnetocaloric effect in YbCrO4

“…The observation of a non-Griffiths phase in YbCrO 4 is unprecedented in the (Y,R)CrO 4 series, which correlates the iso-structural distortion even above T N . The observation is rather similar to that iso-structural correlation to the Griffiths-like phase in ASb 2 O 6 (A = Ni and Mn) [3]. In the current observation a reasonable magnetocaloric effect with |∆S max M | ≈ 5.07 JKg −1 K −1 has been observed, which starts to appear below ∼ 50 K. The onset of ∆S M in the temperature dependence around 50 K is close to T G , where a non-Griffiths-like short-ranged ordered phase emerges.…”

“…The structural study attempts to extract knowledge from the crystallography and understanding origins of the different multifunctional properties of the system. The structural correlation to the electrical and magnetic properties has been recently found crucial in few systems, which provides rich consequences in solid state such as colossal magnetoresistance [1], giant magnetocaloric effect [2], Griffiths phase singularities [3], spontaneous ferroelectric order [4,5], multiferroic order [6]. In the current observation we report important structural correlations to the various unexplored multifunctional properties of YbCrO 4 .…”

“…The χ −1 (T) recorded in FC protocol for different H up to 50 kOe are presented in figure 1(b). All the χ −1 (T ) curves show a downward deviation from linearity below a certain temperature, T G ∼ 48 K. The deviation in χ −1 (T ) curves systematically diminishes with the increase in H. The downturn of the χ −1 (T ) curves and its diminishing behavior with a progressive increase in H are similar to the signature of the Griffiths phase (GP), which has been realized in different systems [22,23,24,25,26,27,3]. To characterize the possible GP, the χ −1 (T ) is fitted with the following power-law behavior describing the Griffiths singularity,…”

Observation of Griffiths-like phase in the quaternary Heusler compound NiFeTiSn

“…Our investigations suggest that this state with short range magnetic correlations complies with the properties of the Griffiths phase (GP). In GP, the magnetic correlation does not vanish immediately above the long range ordering temperature, but it continues to exist up to a higher temperature [17][18][19][20][21]. In systems having ordered magnetic ground state, GP occurs due to the percolative nature of the distribution of short-range ferromagnetic (FM) clusters developed much above the ordering temperature in the magnetically disordered paramagnetic (PM) regime.…”

Observation of Griffiths-like phase in the quaternary Heusler compound NiFeTiSn

“…Our investigations suggest that this state with short range magnetic correlations complies with the properties of the Griffiths phase (GP). In GP, the magnetic correlation does not vanish immediately above the long range ordering temperature, but it continues to exist up to a higher temperature [17][18][19][20][21]. In systems having ordered magnetic ground state, GP occurs due to the percolative nature of the distribution of short-range FM clusters developed much above the ordering temperature in the magnetically disordered paramagnetic (PM) regime.…”