BiMnTeO6 : A multiaxis Ising antiferromagnet

The crystal and magnetic properties of honeycomb BiMnTeO6 have been studied between 1.5 and 300 K using synchrotron x-rays and neutron-scattering experiments. Commensurate magnetic ordering is observed below TN=10K, and corresponds to a noncollinear spin arrangement, with spins tilted away from the anisotropy easy-axis set by the Jahn-Teller distortion of the MnO6 octahedra. Inelastic-scattering experiments show two main nearly localized magnetic excitations, which can be well described by an exchange Hamiltonian involving weak Mn-Mn magnetic interactions and a crystal-field Hamiltonian characterizing the strong easy-axis anisotropy associated with the dz2 orbital ordering of Mn3+. The crystal-field levels can be accurately calculated, taking into account a transverse molecular field imposed by the magnetic ordering of the neighboring atoms below TN. This makes BiMnTeO6 an interesting example of a multiaxis Ising system in a self-imposed transverse magnetic field.

[1]  Jun Zhao,et al.  Intertwined dipolar and multipolar order in the triangular-lattice magnet TmMgGaO4 , 2019, Nature Communications.

[2]  S. Petit,et al.  Topological quantum phase transition in the Ising-like antiferromagnetic spin chain BaCo2V2O8 , 2017, 1706.05848.

[3]  S. Kim,et al.  Structure and Magnetic Behavior of Layered Honeycomb Tellurates, BiM(III)TeO6 (M = Cr, Mn, Fe). , 2016, Inorganic chemistry.

[4]  S. Petit,et al.  Observation of magnetic fragmentation in spin ice , 2016, Nature Physics.

[5]  R. Cava,et al.  Heat capacity peak at the quantum critical point of the transverse Ising magnet CoNb2O6 , 2014, Nature Communications.

[6]  B. Vats,et al.  Preparation and structure of BiCrTeO6: A new compound in Bi–Cr–Te–O system. Thermal expansion studies of Cr2TeO6, Bi2TeO6 and BiCrTeO6 , 2013 .

[7]  Jason Alicea,et al.  New directions in the pursuit of Majorana fermions in solid state systems , 2012, Reports on progress in physics. Physical Society.

[8]  S. Petit.  Numerical simulations and magnetism , 2011 .

[9]  Q. Si,et al.  Heavy Fermions and Quantum Phase Transitions , 2010, Science.

[10]  K. Kiefer,et al.  Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E8 Symmetry , 2010, Science.

[11]  S. Sachdev.  Where is the quantum critical point in the cuprate superconductors? , 2009, 0907.0008.

[12]  G. Aeppli,et al.  Quantum Phase Transition of a Magnet in a Spin Bath , 2005, Science.

[13]  G. Aeppli,et al.  Entangled quantum state of magnetic dipoles , 2003, Nature.

[14]  J. M. Perez-Mato,et al.  Bilbao Crystallographic Server : Useful Databases and Tools for Phase-Transition Studies , 2003 .

[15]  G. McIntyre,et al.  Magnetic excitations of CsMn(SO4)2.12d(2)O, measured by inelastic neutron scattering. , 2001, Journal of the American Chemical Society.

[16]  J. Villain,et al.  Order as an effect of disorder , 1980 .

[17]  P. Pfeuty,et al.  The Ising model with a transverse field. II. Ground state properties , 1971 .

[18]  P. Pfeuty.  The one-dimensional Ising model with a transverse field , 1970 .

[19]  William F. Meggers,et al.  Spectroscopic properties of rare earths , 1965 .

[20]  Hutchings.  POINT CHARGE CALCULATIONS OF ENERGY LEVELS OF MAGNETIC IONS IN CRYSTALLINE ELECTRIC FIELDS. Technical Note 13 , 1963 .