Field induced spin ice like orders in spin liquid Tb${}_2$Ti${}_2$O${}_7$

Abstract

We have studied the field induced magnetic structures in the spin liquid Tb${}_2$Ti${}_2$O${}_7$, in a wide temperature (0.3$<$$T$$<$270 K) and field (0$<$$H$$<$7 T) range, by single crystal neutron diffraction with $\mathbf{H}$ // [110] axis. We combined unpolarized neutron data with polarized ones, analyzed within the local susceptibility model. A ferromagnetic-like structure with $\mathbf{k}$ = 0 propagation vector is induced, whose local order at low field and low temperature is akin to spin ice. The four Tb ions separate in $\alpha$ and $\beta$ chains having different values of the magnetic moments, which is quantitatively explained by taking the crystal field anisotropy into account. Above 2 T and below 2 K, an antiferromagnetic-like structure with $\mathbf{k}$ = (0,0,1) is induced besides the $\mathbf{k}$ = 0 structure. It shows a reentrant behavior and extends over a finite length scale. It occurs together with a broadening of the nuclear peaks, which suggests a field induced distortion and magnetostriction effect.

4 pages, 4 figures

References in corpus (4)

• Dynamically-Induced Frustration as a Route to a Quantum Spin Ice State in Tb2Ti2O7 via Virtual Crystal Field Excitations and Quantum Many-Body Effects
• A Three Dimensional Kasteleyn Transition: Spin Ice in a [100] Field
• Kagomé ice state in the dipolar spin ice Dy_{2}Ti_{2}O_{7}
• Structural Fluctuations in the Spin Liquid State of Tb2Ti2O7

Cited by in corpus (2)

• Matched Slow Pulses Using Double Electromagnetically Induced Transparency
• Investigation of the magnetic fluctuations in Tb${}_2$Sn${}_2$O${}_7$ ordered spin ice by high resolution energy-resolved neutron scattering