Abstract
We have synthesized the novel organic polyradicals BIP-BNO and BIP-TENO, which crystallize to form spin systems with a double spin chain, where BIP-BNO and BIP-TENO denote 3,5′-bis(N-tert-butylaminoxyl)-3′,5-dibromobiphenyl and 3,3′,5,5′-tetrakis(N-teri-butylaminoxyl)biphenyl, respectively. The crystals of BIP-BNO form a two-leg ladder of S = 1/2 with antiferromagnetic legs and rungs. The ground state of this material is singlet. The BIP-TENO molecule includes S = 1/2 spin pairs (dimers) in which the two spins are coupled ferromagnetically. The BIP-TENO crystals form a double spin chain consisting of dimers. All dimers interact antiferromagnetically with each other. This system can be regarded as an antiferromagnetic two-leg ladder when the dimer is taken as a unit. The ground state of this material is singlet and the existence of excitation gaps is suggested by the temperature dependence of the static magnetic susceptibility.
Original language | English |
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Pages (from-to) | 1008-1011 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 69 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2000 Apr |
Externally published | Yes |
Keywords
- Double chain
- Excitation gap
- Organic radical
- Quantum spin
- Singlet ground state
- Spin pair
- Two-leg ladder
ASJC Scopus subject areas
- Physics and Astronomy(all)