FIR-magnetospectroscopy on molecular magnets

H. Nojiri; H. Hachisuka; K. Awaga; P. Kögerler; M. Luban; A. L. Barra

FIR-magnetospectroscopy on molecular magnets

H. Nojiri, H. Hachisuka, K. Awaga, P. Kögerler, M. Luban, A. L. Barra

IMR - Institute for Materials Research (institute affiliation only)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

FIR-magnetospectroscopy has been performed on nano-scale molecular magnets to study their spin Hamiltonian parameters and symmetries. The first case is the characterization of high spin molecule Mn₁₁Crac[Mn ₁₁Cr(O₂CCH₃)₁₆(H₂O) ₄]·4H₂O)] with ferromagnetic ground state, which is made by Cr doping into the most famous ferromagnetic cluster Mn₁₂ac with S=10 ground state. We found that Mn₁₁Crac is the spin-odd cluster(S=19/2) and that the anisotropy parameter is nearly identical to that of Mn₁₂ac. A comparative study of those clusters is very useful to explore spin parity effect in quantum tunnelling. As the second example, we investigate a four-spinring with singlet ground state. We observed forbidden transitions between the ground state and the excited states, which uncovers the nature of the tunnelling gaps caused by the mixing among the quantized levels.

Original language	English
Title of host publication	Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
Editors	M. Thumm, W. Wiesbeck
Pages	127-128
Number of pages	2
Publication status	Published - 2004
Event	Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics - Karlsruhe, Germany Duration: 2004 Sept 27 → 2004 Oct 1

Publication series

Name	Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics

Conference

Conference	Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
Country/Territory	Germany
City	Karlsruhe
Period	04/9/27 → 04/10/1

Cite this

Nojiri, H., Hachisuka, H., Awaga, K., Kögerler, P., Luban, M., & Barra, A. L. (2004). FIR-magnetospectroscopy on molecular magnets. In M. Thumm, & W. Wiesbeck (Eds.), Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics (pp. 127-128). (Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics).

Nojiri, H. ; Hachisuka, H. ; Awaga, K. et al. / FIR-magnetospectroscopy on molecular magnets. Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics. editor / M. Thumm ; W. Wiesbeck. 2004. pp. 127-128 (Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics).

@inproceedings{94f925143a514a8f8bb9624fcaeeb260,

title = "FIR-magnetospectroscopy on molecular magnets",

abstract = "FIR-magnetospectroscopy has been performed on nano-scale molecular magnets to study their spin Hamiltonian parameters and symmetries. The first case is the characterization of high spin molecule Mn11Crac[Mn 11Cr(O2CCH3)16(H2O) 4]·4H2O)] with ferromagnetic ground state, which is made by Cr doping into the most famous ferromagnetic cluster Mn12ac with S=10 ground state. We found that Mn11Crac is the spin-odd cluster(S=19/2) and that the anisotropy parameter is nearly identical to that of Mn12ac. A comparative study of those clusters is very useful to explore spin parity effect in quantum tunnelling. As the second example, we investigate a four-spinring with singlet ground state. We observed forbidden transitions between the ground state and the excited states, which uncovers the nature of the tunnelling gaps caused by the mixing among the quantized levels.",

author = "H. Nojiri and H. Hachisuka and K. Awaga and P. K{\"o}gerler and M. Luban and Barra, {A. L.}",

year = "2004",

language = "English",

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series = "Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics",

pages = "127--128",

editor = "M. Thumm and W. Wiesbeck",

booktitle = "Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics",

note = "Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics ; Conference date: 27-09-2004 Through 01-10-2004",

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Nojiri, H, Hachisuka, H, Awaga, K, Kögerler, P, Luban, M & Barra, AL 2004, FIR-magnetospectroscopy on molecular magnets. in M Thumm & W Wiesbeck (eds), Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics. Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics, pp. 127-128, Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics, Karlsruhe, Germany, 04/9/27.

FIR-magnetospectroscopy on molecular magnets. / Nojiri, H.; Hachisuka, H.; Awaga, K. et al.
Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics. ed. / M. Thumm; W. Wiesbeck. 2004. p. 127-128 (Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Nojiri, H.

AU - Hachisuka, H.

AU - Awaga, K.

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AU - Luban, M.

AU - Barra, A. L.

PY - 2004

Y1 - 2004

N2 - FIR-magnetospectroscopy has been performed on nano-scale molecular magnets to study their spin Hamiltonian parameters and symmetries. The first case is the characterization of high spin molecule Mn11Crac[Mn 11Cr(O2CCH3)16(H2O) 4]·4H2O)] with ferromagnetic ground state, which is made by Cr doping into the most famous ferromagnetic cluster Mn12ac with S=10 ground state. We found that Mn11Crac is the spin-odd cluster(S=19/2) and that the anisotropy parameter is nearly identical to that of Mn12ac. A comparative study of those clusters is very useful to explore spin parity effect in quantum tunnelling. As the second example, we investigate a four-spinring with singlet ground state. We observed forbidden transitions between the ground state and the excited states, which uncovers the nature of the tunnelling gaps caused by the mixing among the quantized levels.

AB - FIR-magnetospectroscopy has been performed on nano-scale molecular magnets to study their spin Hamiltonian parameters and symmetries. The first case is the characterization of high spin molecule Mn11Crac[Mn 11Cr(O2CCH3)16(H2O) 4]·4H2O)] with ferromagnetic ground state, which is made by Cr doping into the most famous ferromagnetic cluster Mn12ac with S=10 ground state. We found that Mn11Crac is the spin-odd cluster(S=19/2) and that the anisotropy parameter is nearly identical to that of Mn12ac. A comparative study of those clusters is very useful to explore spin parity effect in quantum tunnelling. As the second example, we investigate a four-spinring with singlet ground state. We observed forbidden transitions between the ground state and the excited states, which uncovers the nature of the tunnelling gaps caused by the mixing among the quantized levels.

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BT - Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics

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Nojiri H, Hachisuka H, Awaga K, Kögerler P, Luban M, Barra AL. FIR-magnetospectroscopy on molecular magnets. In Thumm M, Wiesbeck W, editors, Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics. 2004. p. 127-128. (Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics).

FIR-magnetospectroscopy on molecular magnets

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