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TRANSVERSE STAGGERED MOMENT IN THE HALDANE-GAP ANTIFERROMAGNET [NI(C2H8N2)2NO2(CLO4)] OBSERVED BY PROTON NUCLEAR-MAGNETIC-RESONANCE
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EXPERIMENTAL-EVIDENCE FOR THE LOWEST EXCITATION MODE IN THE S = 1 HALDANE-GAP SYSTEM - HIGH-FIELD PROTON MAGNETIC-RELAXATION IN NI(C2H8N2)2NO2CLO4
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STRUCTURAL AND MAGNETIC-PROPERTIES OF (CH3)4NNI(NO2)3 - A HALDANE-GAP SYSTEM
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