Structural domain and spin ordering induced glassy magnetic phase in single layered manganite Pr${}_{0.22}$Sr${}_{1.78}$MnO${}_4$

Abstract

The single layered manganite Pr${}_{0.22}$Sr${}_{1.78}$MnO${}_4$ undergoes structural transition from high temperature tetragonal phase to low temperature orthorhombic phase below room temperature. The orthorhombic phase was reported to have two structural variants with slightly different lattice parameters and Mn-3$d$ levels show orbital ordering within both the variants, albeit having mutually perpendicular ordering axis. In addition to orbital ordering, the orthorhombic variants also order antiferromagnetically with different Néel temperatures. Our magnetic investigation on the polycrystalline sample of Pr${}_{0.22}$Sr${}_{1.78}$MnO${}_4$ shows large thermal hysteresis indicating the first order nature of the tetragonal to orthorhombic transition. We observe magnetic memory, large relaxation, frequency dependent ac susceptbility and aging effects at low temperature, which indicate spin glass like magnetic ground state in the sample. The glassy magnetic state presumably arises from the interfacial frustration of orthorhombic domains with orbital and spin orderings playing crucial role toward the competing magnetic interactions.

6 pages, 4 figures, Accepted in Europhysics Letters

References in corpus (11)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Memory and Chaos Effects in Spin Glasses
• Aging and Memory Effects in Superparamagnets and Superspin Glasses
• Magnetic relaxation phenomena and cluster glass properties of La{0.7-x}Y{x}Ca{0.3}MnO{3} manganites
• Memory in nanomagnetic systems: Superparamagnetism versus Spinglass behavior
• Spin-glass-like state in GdCu: role of phase separation and magnetic frustration
• Comment on "Memory Effects in an Interacting Magnetic Nanoparticle System"
• Eu${}_{0.5}$Sr${}_{1.5}$MnO${}_4$: a three-dimensional XY spin glass
• Variation of charge/orbital ordering in layered manganites Pr1-xCa1+xMnO4 investigated by transmission electron microscopy
• Coexistence of long-ranged charge and orbital order and spin-glass state in single-layered manganites with weak quenched disorder
• Logarithmic growth law in the two-dimensional Ising spin glass state resulting from the electron doping in single-layered manganites

Cited by in corpus (1)

• Nature of the glassy magnetic state in Cu${}_{2.84}$Mn${}_{0.44}$Al${}_{0.72}$ shape memory alloy