Spin excitations in 3D molecular magnets probed by neutron scattering

H. N. Bordallo; L. C. Chapon; J. C. Cook; J. R.D. Copley; E. Goremychkin; S. Kern; S. H. Lee; T. Yildirim; J. L. Manson

doi:10.1007/s003390201350

Spin excitations in 3D molecular magnets probed by neutron scattering

H. N. Bordallo^*, L. C. Chapon, J. C. Cook, J. R.D. Copley, E. Goremychkin, S. Kern, S. H. Lee, T. Yildirim, J. L. Manson

^*Corresponding author for this work

8 Citations (Scopus)

Abstract

The emerging field of molecular magnetism constitutes a new branch of materials science that deals with the magnetic properties of molecules, or assemblies of molecules, that contain magnetic centers. The growing interest in understanding the origin of the magnetic ordering in these materials is to obtain novel multiproperty molecular magnetic materials with high transition temperatures. Molecules based on the dicyanamide ion [NΞC-N-CΞN], abbreviated (dca), such as M(dca)₂ [M = Mn, Ni], have shown interesting bulk properties that prompted our inelastic neutron scattering (INS) studies. While the Mn²⁺ ion is isotropic because of its L = 0 configuration, the isostructural Ni analog has S = 1 and demonstrates marked single-ion anisotropy. Mn(dca)₂ is a canted antiferromagnet below 16 K, while Ni(dca)₂ is a ferromagnet below 21 K. INS has been used to investigate the magnetic excitations in Mn(dca)₂ and Ni(dca)₂. For Mn(dca)₂, a Heisenberg model gives good correspondence with the experimental results.

Original language	English
Journal	Applied Physics A: Materials Science and Processing
Volume	74
Issue number	SUPPL.I
ISSN	0947-8396
DOIs	https://doi.org/10.1007/s003390201350
Publication status	Published - 1 Dec 2002
Externally published	Yes

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title = "Spin excitations in 3D molecular magnets probed by neutron scattering",

abstract = "The emerging field of molecular magnetism constitutes a new branch of materials science that deals with the magnetic properties of molecules, or assemblies of molecules, that contain magnetic centers. The growing interest in understanding the origin of the magnetic ordering in these materials is to obtain novel multiproperty molecular magnetic materials with high transition temperatures. Molecules based on the dicyanamide ion [NΞC-N-CΞN], abbreviated (dca), such as M(dca)2 [M = Mn, Ni], have shown interesting bulk properties that prompted our inelastic neutron scattering (INS) studies. While the Mn2+ ion is isotropic because of its L = 0 configuration, the isostructural Ni analog has S = 1 and demonstrates marked single-ion anisotropy. Mn(dca)2 is a canted antiferromagnet below 16 K, while Ni(dca)2 is a ferromagnet below 21 K. INS has been used to investigate the magnetic excitations in Mn(dca)2 and Ni(dca)2. For Mn(dca)2, a Heisenberg model gives good correspondence with the experimental results.",

author = "Bordallo, {H. N.} and Chapon, {L. C.} and Cook, {J. C.} and Copley, {J. R.D.} and E. Goremychkin and S. Kern and Lee, {S. H.} and T. Yildirim and Manson, {J. L.}",

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T1 - Spin excitations in 3D molecular magnets probed by neutron scattering

AU - Bordallo, H. N.

AU - Chapon, L. C.

AU - Cook, J. C.

AU - Copley, J. R.D.

AU - Goremychkin, E.

AU - Kern, S.

AU - Lee, S. H.

AU - Yildirim, T.

AU - Manson, J. L.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - The emerging field of molecular magnetism constitutes a new branch of materials science that deals with the magnetic properties of molecules, or assemblies of molecules, that contain magnetic centers. The growing interest in understanding the origin of the magnetic ordering in these materials is to obtain novel multiproperty molecular magnetic materials with high transition temperatures. Molecules based on the dicyanamide ion [NΞC-N-CΞN], abbreviated (dca), such as M(dca)2 [M = Mn, Ni], have shown interesting bulk properties that prompted our inelastic neutron scattering (INS) studies. While the Mn2+ ion is isotropic because of its L = 0 configuration, the isostructural Ni analog has S = 1 and demonstrates marked single-ion anisotropy. Mn(dca)2 is a canted antiferromagnet below 16 K, while Ni(dca)2 is a ferromagnet below 21 K. INS has been used to investigate the magnetic excitations in Mn(dca)2 and Ni(dca)2. For Mn(dca)2, a Heisenberg model gives good correspondence with the experimental results.

AB - The emerging field of molecular magnetism constitutes a new branch of materials science that deals with the magnetic properties of molecules, or assemblies of molecules, that contain magnetic centers. The growing interest in understanding the origin of the magnetic ordering in these materials is to obtain novel multiproperty molecular magnetic materials with high transition temperatures. Molecules based on the dicyanamide ion [NΞC-N-CΞN], abbreviated (dca), such as M(dca)2 [M = Mn, Ni], have shown interesting bulk properties that prompted our inelastic neutron scattering (INS) studies. While the Mn2+ ion is isotropic because of its L = 0 configuration, the isostructural Ni analog has S = 1 and demonstrates marked single-ion anisotropy. Mn(dca)2 is a canted antiferromagnet below 16 K, while Ni(dca)2 is a ferromagnet below 21 K. INS has been used to investigate the magnetic excitations in Mn(dca)2 and Ni(dca)2. For Mn(dca)2, a Heisenberg model gives good correspondence with the experimental results.

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DO - 10.1007/s003390201350

M3 - Journal article

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SN - 0947-8396

VL - 74

JO - Applied Physics A: Materials Science & Processing

JF - Applied Physics A: Materials Science & Processing

IS - SUPPL.I

ER -

Spin excitations in 3D molecular magnets probed by neutron scattering

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