Anisotropic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow><mml:mi>Ru</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo> </mml:mo><mml:mrow><mml:mn>4</mml:mn><mml:msup><mml:mi>d</mml:mi><mml:mn>5</mml:mn></mml:msup></mml:mrow></mml:math>magnetism in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mrow><mml:mi>RuCl</mml:mi></mml:mrow><mml:mn>3</mml:mn…

M. Majumder, Marcus Schmidt, H. Rösner, Alexander A. Tsirlin, Hiroshi Yaśuoka, M. Baenitz

Abstract

Hexagonal $\ensuremath{\alpha}$-Ru trichloride single crystals exhibit a strong magnetic anisotropy and we show that upon applying fields up to 14 T in the honeycomb plane the successive magnetic order at ${T}_{1}=14\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ and ${T}_{2}=8\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ could be completely suppressed, whereas in the perpendicular direction the magnetic order is robust. Furthermore, the field dependence of $\ensuremath{\chi}(\mathrm{T})$ implies coexisting ferro- and antiferromagnetic exchange between in-plane components of ${\text{Ru}}^{3+}$ spins, whereas for out-of-plane components a strong antiferromagnetic exchange becomes evident. $^{101}\mathrm{Ru}$ zero-field nuclear magnetic resonance in the ordered state evidence a complex (probably noncoplanar chiral) long-range magnetic structure. The large orbital moment on ${\mathrm{Ru}}^{3+}$ is found in density-functional calculations.

Locations

• arXiv (Cornell University) - View - PDF
• DataCite API - View
• Physical Review B - View