Journal
PHYSICAL REVIEW B
Volume 79, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.134416
Keywords
antiferromagnetic materials; chromium alloys; frustration; magnetisation; nickel alloys; nuclear magnetic resonance; specific heat
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [451, 473]
- CREST Japan Science and Technology Corporation (JST)
- NOE-MAGMAGNET
- COFIN [2006029518]
- U. S. Department of Energy by Iowa State University [W-7405-Eng-82]
- Director for Energy Research, Office of Basic Energy Sciences
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The magnetic properties of an odd spin number antiferromagnetic ring Cr8Ni have been investigated by high-field magnetization, specific-heat, and nuclear-magnetic-resonance measurements at very low temperatures (below 1 K). It is found that the ground state of this frustrated spin ring is a singlet state with total spin value S-T=0 and zero expectation value of the local spins. The energy-level structure for low-lying excited total spin state S-T not equal 0 shows a breakdown of the Lande interval rule in agreement with theoretical results. Evidences of sizeable Dzyaloshinski-Moriya interactions have been found in the magnetic-field dependence of low-temperature specific-heat and magnetization data.
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