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 af dette arbejde

8 Citationer (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.

Originalsprog	Engelsk
Tidsskrift	Applied Physics A: Materials Science and Processing
Vol/bind	74
Udgave nummer	SUPPL.I
ISSN	0947-8396
DOI	https://doi.org/10.1007/s003390201350
Status	Udgivet - 1 dec. 2002
Udgivet eksternt	Ja

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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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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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SN - 0947-8396

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JO - Applied Physics A: Materials Science & Processing

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Spin excitations in 3D molecular magnets probed by neutron scattering

Abstract

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