Cluster spin-glass behaviour and memory effect in Cr${}_{0.5}$Fe${}_{0.5}$Ga

Abstract

We report the structural, static, and dynamic properties of Cr${}_{0.5}$Fe${}_{0.5}$Ga by means of powder x-ray diffraction, magnetization, heat capacity, magnetic relaxation, and magnetic memory effect measurements. DC magnetization and AC susceptibility studies reveal a spin-glass transition at around $T_{\mathrm{f}}\simeq 22$~K. An intermediate value of the relative shift in freezing temperature $\delta T_{\mathrm{f}}\simeq 0.017$, obtained from the AC susceptibility data reflects the formation of cluster spin-glass states. The frequency dependence of $T_{\mathrm{f}}$ is also analyzed within the framework of dynamic scaling laws. The analysis using power law yields a time constant for a single spin flip $\tau \ast \simeq 1.1\times 10^{-10}$~s and critical exponent $z{\nu }^{\prime }=4.2\pm 0.2$. On the other hand, the Vogel-Fulcher (VF) law yields the time constant for a single spin flip ${\tau }_0\simeq 6.6\times 10^{-9}$~s, VF temperature $T_0=21.1\pm 0.1$~K, and an activation energy $E_{\mathrm{a}}/k_{\mathrm{B}}\simeq 16$~K. The value of $\tau \ast$ and ${\tau }_0$ along with a non-zero value of $T_0$ provide further evidence for the cluster spin-glass behaviour. The magnetic field dependent $T_{\mathrm{f}}$ follows the de Almeida-Thouless line with a non-mean-field type instability, reflecting either a different universality class or strong anisotropy in the spin system. A detailed non-equilibrium dynamics study via relaxation and memory effect experiments demonstrates striking memory effects. All the above observations render a cluster spin-glass behaviour which is triggered by magnetic frustration due to competing antiferromagnetic and ferromagnetic interactions and magnetic site disorder. Moreover, the asymmetric response of magnetic relaxation with respect to the change in temperature, below $T_{\mathrm{f}}$ can be explained by the hierarchical model.

Phys. Rev. B (Accepted, 2018) 11 pages, 10 figures, 1 table

References in corpus (12)

• Magnetic Pyrochlore Oxides
• Memory and Chaos Effects in Spin Glasses
• Ferromagnetic cluster spin-glass behavior in PrRhSn3
• Reentrant spin glass state in Mn doped Ni2MnSn shape memory alloy
• Magnetic properties of BaCdVO(PO_4)_2: a strongly frustrated spin-1/2 square lattice close to the quantum critical regime
• Spin-glass behavior in Ni-doped La1:85Sr0:15CuO4
• Spin Glass Behavior in RuSr2Gd1.5Ce0.5Cu2O10
• Cluster spin glass behavior in geometrically frustrated Zn3V3O8
• Spin-glass-like state in GdCu: role of phase separation and magnetic frustration
• Memory effects and magnetic relaxation in single-crystalline La${}_{0.9}$Sr${}_{0.1}$CoO${}_3$
• Magnetic Field Dependence of Spin Glass Free Energy Barriers
• Dynamic scaling analysis of the long-range RKKY Ising spin glass Dy${}_x$Y${}_{1-x}$Ru${}_2$Si${}_2$

Cited by in corpus (22)

• Universal spin-glass behaviour in bulk LaNiO2, PrNiO2 and NdNiO2
• Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr4S8
• Magnetic memory effect in ensembles of interacting anisotropic magnetic nanoparticles
• Unconventional superparamagnetic behavior in the modified cubic spinel compound LiNi${}_{0.5}$Mn${}_{1.5}$O${}_4$
• Bose-Einstein condensation of triplons close to the quantum critical point in the quasi-one-dimensional spin-$1/2$ antiferromagnet NaVOPO${}_4$
• Singlet ground state in the alternating spin-$1/2$ chain compound NaVOAsO${}_4$
• A Spin Glass State in Ba3TiRu2O9
• Evidence of a cluster spin-glass state in the B-site disordered perovskite SrTi0.5Mn0.5O3
• Spin-glass behavior in Shastry-Sutherland lattice of Tm${}_{\text{2}}$Cu${}_{\text{2}}$In
• Two types of alternating spin-$\frac{1}{2}$ chains and their field-induced transitions in $\epsilon$-LiVOPO${}_4$
• Ferrimagnetic 120${}^{\circ }$ magnetic structure in Cu2OSO4
• Mapping AC Susceptibility with Quantum Diamond Microscope
• Tuning of Electrical, Magnetic, and Topological Properties of Magnetic Weyl Semimetal Mn${}_{3+x}$Ge by Fe doping
• Suppression of long-range ordering and multiferroicity in Sr-substituted Ba3-xSrxMnNb2O9 (x = 1 and 3)
• Emergence of low temperature glassy dynamics in Ru substituted non magnetic insulator CaHfO3
• Electron doping induced magnetic glassy state in phase separated YBaCo${}_2$O${}_{5.5-\delta }$
• Magneto-structural and dynamic susceptibility studies on rare-earth rich intermetallic compound
• Non-equilibrium spin dynamics in the temperature and magnetic field dependence of magnetization curves of ferrimagnetic Co${}_{1.75}$Fe${}_{1.25}$O${}_4$ and its composite with BaTiO${}_3$
• Cluster Spin Glass State in Ba${}_3$Sb${}_{1+x}$Co${}_{2-x}$O${}_{9-\delta }$: Cation Disorder and Mixed-Valence Co Dimers
• Coexistence of magnetic and dielectric glassy states in alternating kagome and triangular lattice LuBaCo${}_4$O${}_7$ cobaltite
• Impact of the lead factor of neutron irradiation on the magnetic properties of RPV steels
• Finite Spinon Density-of-States in Triangular-Lattice Delafossite TlYbSe${}_2$