Role of anisotropy in the spin-dimer compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi><mml:mi mathvariant="normal">Cu</mml:mi><mml:msub><mml:mi mathvariant="normal">Si</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>
Suchitra E. SebastianDepartment of Applied Physics, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305-4045, USAPhilip TañedoDepartment of Applied Physics, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305-4045, USAPaul GoddardMST-NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAS.-C. LeeDepartment of Physics, University of Florida, Gainesville, Florida 32611, USAA. WilsonDepartment of Physics, University of Florida, Gainesville, Florida 32611, USAS. KimDepartment of Physics, University of Florida, Gainesville, Florida 32611, USASusan CoxMST-NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAR. McDonaldMST-NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAStephen HillDepartment of Physics, University of Florida, Gainesville, Florida 32611, USAN. HarrisonMST-NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USACristian D. BatistaMST-NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAI. R. FisherDepartment of Applied Physics, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305-4045, USA
2006lv
ABI
Annotatsiya
We present results of magnetization and electron paramagnetic resonance experiments on the spin-dimer system $\mathrm{Ba}\mathrm{Cu}{\mathrm{Si}}_{2}{\mathrm{O}}_{6}$. Evidence indicates that the origin of anisotropic terms in the spin Hamiltonian lies in magnetic dipolar interactions. Axial symmetry breaking is on a very small energy scale of $\ensuremath{\leqslant}11\phantom{\rule{0.3em}{0ex}}\mathrm{mK}$, confirming Bose-Einstein condensation critical scaling over an extended temperature range in the vicinity of the quantum critical point.
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