Field-rotational magnetocaloric effect: A new experimental technique for accurate measurement of the anisotropic magnetic entropy

Abstract

We developed a new technique for measuring the thermodynamic entropy as a function of the magnetic field angle. This technique enables high-resolution angle-resolved measurements of the entropy in an unprecedentedly short measuring time. When the magnetic field is rotated under adiabatic conditions, the sample temperature changes owing to the field-angle variation of its entropy, which is referred to as the rotational magnetocaloric effect. By investigating this effect along with the specific heat, the field-angle dependence of the entropy can be determined. To demonstrate this technique, we chose the spin-ice compound Dy${}_2$Ti${}_2$O${}_7$ as a benchmark and showed good agreement between the measured and theoretical entropies as a function of the field angle. This development provides a new approach to studying condensed-matter physics, in which multiple degrees of freedom play an important role.

5 pages, 6 figures, published in J. Phys. Soc. Jpn

References in corpus (12)

• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• Observation of Magnetic Monopoles in Spin Ice
• Theory of the [111] magnetization plateau in spin ice
• Dy2Ti2O7 Spin Ice: a Test Case for Emergent Clusters in a Frustrated Magnet
• Pinch Points and Kasteleyn Transitions: How Spin Ice Changes its Entropy
• First-Order Superconducting Transition of Sr2RuO4
• Kagomé ice state in the dipolar spin ice Dy_{2}Ti_{2}O_{7}
• Sharp magnetization jump at the first-order superconducting transition in Sr2RuO4
• Specific-heat evidence of the first-order superconducting transition in Sr2RuO4
• Wing structure in the phase diagram of the Ising Ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements
• Continuum excitation and pseudospin wave in quantum spin-liquid and quadrupole ordered states of Tb${}_{2+x}$Ti${}_{2-x}$O${}_{7+y}$
• Quasi-one-dimensional Bose-Einstein Condensation in the Spin-1/2 Ferromagnetic-leg Ladder 3-I-V

Cited by in corpus (10)

• Field-Orientation Effect on Ferro-Quadrupole Order in PrTi2Al20
• Field-angle-resolved landscape of non-Fermi-liquid behavior in the quasi-kagome Kondo Lattice CeRhSn
• Spin ice in a general applied magnetic field: Kasteleyn transition, magnetic torque and rotational magnetocaloric effect
• Anisotropy of the magnetic-field-induced phase pocket in the non-Kramers doublet system PrIr${}_2$Zn${}_{20}$
• Crystal-field magnetostriction of the spin ice under ultrahigh magnetic fields
• Universal dynamics of magnetic monopoles in two-dimensional kagomé ice
• Emergent critical phenomenon in spin-1/2 ferromagnetic-leg ladders: Quasi-one-dimensional Bose--Einstein condensate
• Rotational Grüneisen ratio: a probe for quantum criticality in anisotropic systems
• Probing magnetic-field-induced multipolar ordering through field-angle-resolved magnetostriction and thermal expansion in PrIr${}_2$Zn${}_{20}$
• Anisotropic field response of specific heat for a ferromagnetic superconductor UCoGe in magnetic fields