Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl 2(urea) 2
Abstract
MnCl 2(urea) 2 is a new linear chain coordination polymer that exhibits slightly counter-rotated Mn 2Cl 2 rhomboids along the chain-axis. The material crystallizes in the noncentrosymmetric orthorhombic space group Iba2, with each Mn(II) ion equatorially surrounded by four Cl - that lead to bibridged ribbons. Urea ligands coordinate via O atoms in the axial positions. Hydrogen bonds of the Cl···H–N and O···H–N type link the chains into a quasi-3D network. Magnetic susceptibility data reveal a broad maximum at 9 K that is consistent with short-range magnetic order. Pulsed-field magnetization measurements conducted at 0.6 K show that a fully polarized magnetic state is achieved at B sat = 19.6 T with another field-induced phase transition occurring at 2.8 T. Zero-field neutron diffraction studies made on a powdered sample of MnCl 2(urea) 2 reveal that long-range magnetic order occurs below TN = 3.2(1) K. Additional Bragg peaks due to antiferromagnetic (AFM) ordering can be indexed according to the Ib'a2' magnetic space group and propagation vector τ = [0, 0, 0]. Rietveld profile analysis of these data revealed a Néel-type collinear ordering of Mn(II) ions with an ordered magnetic moment of 4.06(6) μB (5 μB is expected for isotropic S = 5/2)more »
- Authors:
-
[5];
- Eastern Washington University, Cheney, WA (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Delaware, Newark, DE (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Durham Univ. (United Kingdom)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1457261
- Alternate Identifier(s):
- OSTI ID: 1528743
- Report Number(s):
- LA-UR-15-27162
Journal ID: ISSN 0020-1669
- Grant/Contract Number:
- AC52-06NA25396; AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Inorganic Chemistry
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 24; Journal ID: ISSN 0020-1669
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Manson, Jamie L., Huang, Qing-zhen, Brown, Craig M., Lynn, Jeffrey W., Stone, Matthew B., Singleton, John, and Xiao, Fan. Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl2(urea)2. United States: N. p., 2015.
Web. doi:10.1021/acs.inorgchem.5b02162.
Manson, Jamie L., Huang, Qing-zhen, Brown, Craig M., Lynn, Jeffrey W., Stone, Matthew B., Singleton, John, & Xiao, Fan. Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl2(urea)2. United States. https://doi.org/10.1021/acs.inorgchem.5b02162
Manson, Jamie L., Huang, Qing-zhen, Brown, Craig M., Lynn, Jeffrey W., Stone, Matthew B., Singleton, John, and Xiao, Fan. Tue .
"Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl2(urea)2". United States. https://doi.org/10.1021/acs.inorgchem.5b02162. https://www.osti.gov/servlets/purl/1457261.
@article{osti_1457261,
title = {Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl2(urea)2},
author = {Manson, Jamie L. and Huang, Qing-zhen and Brown, Craig M. and Lynn, Jeffrey W. and Stone, Matthew B. and Singleton, John and Xiao, Fan},
abstractNote = {MnCl2(urea)2 is a new linear chain coordination polymer that exhibits slightly counter-rotated Mn2Cl2 rhomboids along the chain-axis. The material crystallizes in the noncentrosymmetric orthorhombic space group Iba2, with each Mn(II) ion equatorially surrounded by four Cl- that lead to bibridged ribbons. Urea ligands coordinate via O atoms in the axial positions. Hydrogen bonds of the Cl···H–N and O···H–N type link the chains into a quasi-3D network. Magnetic susceptibility data reveal a broad maximum at 9 K that is consistent with short-range magnetic order. Pulsed-field magnetization measurements conducted at 0.6 K show that a fully polarized magnetic state is achieved at Bsat = 19.6 T with another field-induced phase transition occurring at 2.8 T. Zero-field neutron diffraction studies made on a powdered sample of MnCl2(urea)2 reveal that long-range magnetic order occurs below TN = 3.2(1) K. Additional Bragg peaks due to antiferromagnetic (AFM) ordering can be indexed according to the Ib'a2' magnetic space group and propagation vector τ = [0, 0, 0]. Rietveld profile analysis of these data revealed a Néel-type collinear ordering of Mn(II) ions with an ordered magnetic moment of 4.06(6) μB (5 μB is expected for isotropic S = 5/2) oriented along the b-axis, i.e., perpendicular to the chain-axis that runs along the c-direction. Owing to the potential for spatial exchange anisotropy and the pitfalls in modeling bulk magnetic data, we analyzed inelastic neutron scattering data to retrieve the exchange constants: Jc = 2.22 K (intrachain), Ja = -0.10 K (interchain), and D = -0.14 K with J > 0 assigned to AFM coupling. This J configuration is most unusual and contrasts the more commonly observed AFM interchain coupling of 1D chains.},
doi = {10.1021/acs.inorgchem.5b02162},
url = {https://www.osti.gov/biblio/1457261},
journal = {Inorganic Chemistry},
issn = {0020-1669},
number = 24,
volume = 54,
place = {United States},
year = {2015},
month = {12}
}
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Works referencing / citing this record:
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