1,3-propanediammonium tetrachloromanganate(II) (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">NH</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CH</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CH</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CH</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">NH</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>)Mn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cl</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: A canted quasi-two-dimensional antiferromagnet
Abstract
The magnetic susceptibilities of single crystals of 1,3-propanediammonium tetrachloromanganate(II),(${\mathrm{NH}}_{3}$${\mathrm{CH}}_{2}$${\mathrm{CH}}_{2}$${\mathrm{CH}}_{2}$${\mathrm{NH}}_{3}$)Mn${\mathrm{Cl}}_{4}$, have been measured from 4.2 to 220\ifmmode^\circ\else\textdegree\fi{}K. High-field magnetization measurements below the transition temperature are reported. In moderate magnetic fields, the material undergoes a transition to an antiferromagnetic state at ${T}_{N}=43.6$\ifmmode^\circ\else\textdegree\fi{}K with the $b$ axis being the preferred axis. Near-zero-field susceptibility measurements below ${T}_{N}$ reveal a more complex behavior suggestive of a canted spin system since net moments are observed along the $b$ and $c$ axes. High-field magnetization measurements along the preferred axis reveal a spin-flop transition at ${H}_{\mathrm{SF}}=24.2$ kOe. The data below ${T}_{N}$ can be qualitatively accounted for by considering a model based on Dzyaloshinsky-Moriya interactions being included in the Hamiltonian. A plausible arrangement of the sublattice moments is suggested based on the known crystal structure. Above 50\ifmmode^\circ\else\textdegree\fi{}K the susceptibilities are isotropic and reflect the quasi-two-dimensional nature of the complex. Analysis of the high-temperature series expansions reveals the intralayer exchange constant to be $|\frac{J}{k}|=4.6$ K.
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