量子-古典共存スピン系Cu2CdB2O6の高周波ESR
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The coexistence of a nearly spin-singlet state and antiferromagnetic long-range order (AFLRO) were found in Cu2CdB2O6. The High frequency ESR measurements have been performed by using a Millimeter Wave Vector Network Analyzer (MVNA; ABmm) with a small cavity in the frequency of 35-100 GHz. Below the temperature of TN=9.8K, ESR absorptions were observed. The frequency-field diagram of ESR absorption lines was obtained by the multiple frequency ESR measurements at the temperature of 1.5K. We analyzed these frequency-field relations based on AFMR of the two-sublattice antiferromagnetic with uniaxitial type anisotropy. The AFMR mode at zero magnetic field has a finite antiferromagnetic gap of about 38 GHz. The spin-flop magnetic field Hc=1.38 T was estimated. These results are consistent with the coexistence model of a nearly spin-singlet state and AFLRO in Cu2CdB2O6.
- 福井大学の論文
福井大学 | 論文
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