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  Magnetic structure of Tb2Ir2O7 determined by powder neutron diffraction

Guo, H., Ritter, C., & Komarek, A. C. (2017). Magnetic structure of Tb2Ir2O7 determined by powder neutron diffraction. Physical Review B, 96(14): 144415, pp. 1-4. doi:10.1103/PhysRevB.96.144415.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-120F-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1211-0
Genre: Journal Article

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 Creators:
Guo, H.1, Author              
Ritter, C.2, Author
Komarek, A. C.3, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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 Abstract: We report on the determination of the full magnetic structure of Tb2Ir2O7 including the Ir sublattice by means of powder neutron diffraction. Below T-N similar to 125 K, both the Tb and the Ir sublattices order in a so-called all-in/all-out magnetic structure. However, additional magnetic intensity appears below 10 K on the (111) reflection indicating a change in the magnetic structure. We were able to describe the low-temperature magnetic structure with an additional XY component on the Tb sublattices. The moment sizes at 1.5 K amount to 0.55(3) mu(B)/Ir and 5.22(3) mu(B)/Tb. The Tb3+ moments are titled about 6 degrees off from the [111] direction. Moreover, it was found that the Tb moments couple antiferromagnetically with their six nearest-neighboring Ir moments below TN. This is in contrast to the case of Nd2Ir2O7. The Ir4+ moment sizes of Tb2Ir2O7 are larger than that of Nd2Ir2O7 indicating that hybridization effects between the Ir 5d and the O 2p orbitals are smaller in Tb2Ir2O7.

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Language(s): eng - English
 Dates: 2017-10-122017-10-12
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 96 (14) Sequence Number: 144415 Start / End Page: 1 - 4 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008