Titanium pyrochlore magnets: how much can be learned from magnetization measurements?

Abstract

We report magnetization data for several titanium pyrochlore systems measured down to 0.5 K. The measurements, performed on single crystal samples in fields of up to 7 T, have captured the essential elements of the previously reported phase transitions in these compounds and have also revealed additional important features overlooked previously either because of the insufficiently low temperatures used, or due to limitations imposed by polycrystalline samples. For the spin-ice pyrochlores Dy2Ti2O7 and Ho2Ti2O7, an unusually slow relaxation of the magnetization has been observed in lower fields, while the magnetization process in higher fields is essentially hysteresis-free and does not depend on sample history. For the XY pyrochlore Er2Ti2O7, the magnetic susceptibility shows nearly diverging behaviour on approach to a critical field, HC = 13.5 kOe, above which the magnetization does not saturate but continues to grow at a significant rate. For the Heisenberg pyrochlore Gd2Ti2O7, the magnetic susceptibility shows a pronounced change of slope at both transition temperatures, TN1 = 1.02 K and TN2 = 0.74 K, contrary to the earlier reports.

to appear in J. Phys.: Condens. Matter

References in corpus (3)

• Low Temperature Spin Freezing in Dy2Ti2O7 Spin Ice
• Unconventional magnetization processes and thermal runaway in spin-ice Dy${}_2$Ti${}_2$O${}_7$
• Single-ion anisotropy in the gadolinium pyrochlores studied by an electron paramagnetic resonance

Cited by in corpus (21)

• Spin Ice, Fractionalization and Topological Order
• Quantum order by disorder and accidental soft mode Er2Ti2O7
• New physics in frustrated magnets: Spin ices, monopoles, etc
• Vibrating-coil magnetometry of the spin liquid properties of Tb2Ti2O7
• Nature of finite-temperature transition in anisotropic pyrochlore Er2Ti2O7
• Crystal Shape-Dependent Magnetic Susceptibility and Curie Law Crossover in the Spin Ices Dy2Ti2O7 and Ho2Ti2O7
• First order metamagnetic transition in Ho2Ti2O7 observed by vibrating coil magnetometry at milli-Kelvin temperatures
• Long range order in the dipolar XY antiferromagnet Er${}_2$Sn${}_2$O${}_7$
• Palmer-Chalker correlations in the XY pyrochlore antiferromagnet Er2Sn2O7
• Monopole ordered phases in dipolar and nearest-neighbours Ising pyrochlore: from spin ice to the "all-in--all-out" antiferromagnet
• Melting of Spin Ice state through structural disorder in Dy2Zr2O7
• Magnetisation process in Er2Ti2O7 and Tb2Ti2O7 at very low temperature
• Ultrasonic investigations of spin-ices Dy${}_2$Ti${}_2$O${}_7$ and Ho${}_2$Ti${}_2$O${}_7$ in and out of equilibrium
• Intrinsic and extrinsic nonstationary field-driven processes in the spin-ice compound Dy2Ti2O7
• Single crystal growth, structure and magnetic properties of Pr2Hf2O7 pyrochlore
• Novel magnetic phases in a Gd2Ti2O7 pyrochlore for a field applied along the [100] axis
• Low-temperature magnetisation process in the cubic pyrochlore quantum antiferromagnet, Er2Ti2O7
• Extremely slow non-equilibrium monopole dynamics in classical spin ice
• Magnetic interactions and spin dynamics in the bond-disordered pyrochlore fluoride NaCaCo${}_2$F${}_7$
• Traversing the pyrochlore stability diagram; microwave-assisted synthesis and discovery of mixed B-site Ln${}_2$InSbO${}_7$ family
• Magnetic and thermodynamic studies on the distorted kagome magnet Pr${}_3$BWO${}_9$