Dynamic properties of a diluted pyrochlore cooperative paramagnet (Tb_pY_{1-p})_2Ti_2O_7

Abstract

Investigations of the spin dynamics of the geometrically frustrated pyrochlore (Tb_pY_{1-p})_2Ti_2O_7, using muon spin relaxation and neutron spin echo, as a function of magnetic coverage p, have been carried out. Our major finding is that paramagnetic fluctuations prevail as T->0 for all values of p, and that they are sensitive to dilution, indicating a cooperative spin motion. However, the percolation threshold p_c is not a critical point for the fluctuations. We also find that the low temperatures spectral density has a 1/f behavior, and that dilution slows down the spin fluctuations.

5 pages, 5 figure

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Cited by in corpus (31)

• Magnetic Pyrochlore Oxides
• Magnetic Charge Transport
• Dynamically-Induced Frustration as a Route to a Quantum Spin Ice State in Tb2Ti2O7 via Virtual Crystal Field Excitations and Quantum Many-Body Effects
• $\mu$SR evidence for the U(1) quantum spin liquid ground state in the triangular antiferromagnet YbMgGaO${}_4$
• Quantum spin liquid ground state in the disorder free triangular lattice NaYbS${}_2$
• Magnetic density of states at low energy in geometrically frustrated systems
• Quantum and thermal spin relaxation in diluted spin ice: Dy(2-x)MxTi2O7 (M = Lu, Y)
• Spin Liquid Ground State in the Frustrated Kagome Antiferromagnet MgCu3(OH)6Cl2
• Direct evidence for a dynamical ground state in the highly frustrated Tb${}_2$Sn${}_2$O${}_7$ pyrochlore
• Single crystal growth of the pyrochlores $R_2$Ti${}_2$O${}_7$ ($R$ = rare earth) by the optical floating-zone method
• Experimental signatures of quantum and topological states in frustrated magnetism
• Slow spin relaxation in a highly polarized cooperative paramagnet
• Spin dynamics in the S =1/2 kagome compound vesignieite, Cu3Ba(VO5H)2
• Magnetothermodynamics of the Ising Antiferromagnet Dy2Ge2O7
• $\mu$SR Insight into the Impurity Problem in Quantum Kagome Antiferromagnets
• Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer
• Inhomogeneous level splitting in Pr${}_{2-x}$Bi${}_x$Ru${}_2$O${}_7$
• Low temperature dynamic freezing and the fragility of ordering in Tb2Sn2O7
• Calculation of the Expected Zero Field Muon Relaxation Rate in the Geometrically Frustrated Rare Earth Pyrochlore Gd2Sn2O7 Antiferromagnet
• Lack of static lattice distortion in $T{b}_{2}T{i}_2{O}_7$
• Possible Quantum Diffusion of Polaronic Muons in Dy${}_2$Ti${}_2$O${}_7$ Spin Ice
• Evidence of quantum spin liquid state in a Cu${}^{2+}$-based $S=1/2$ triangular lattice antiferromagnet
• Coexisting Magnetic Order and Cooperative Paramagnetism in the Stuffed Pyrochlore Tb_{2+x}Ti_{2-2x}Nb_xO_7
• Dilution effects in Ho${}_{2-x}$Y${}_x$Sn${}_2$O${}_7$: from the Spin Ice to the single-ion magnet
• Traversing the pyrochlore stability diagram; microwave-assisted synthesis and discovery of mixed B-site Ln${}_2$InSbO${}_7$ family
• Dynamic Spin Fluctuations at $T\to 0$ in a Spin-1/2 Ferromagnetic Kagome Lattice
• Possible realization of a randomness-driven quantum disordered state in an S = 1/2 antiferromagnet Sr3CuTa2O9
• Observation of a gapped phase in the one-dimensional $S=\frac{1}{2}$ Heisenberg antiferromagnetic chain Cu(Ampy)ClBr
• Three-dimensional Sandglass Magnet with Non-Kramers ions
• Critical slowing down in the geometrically frustrated pyrochlore antiferromagnet Gd_2Ti_2O_7
• Power-law dynamics in the spin-liquid kagome lattices SrCr8Ga4O19 and ZnCu3(OH)6Cl2