Ultrawide temperature range super-invar behavior of R2(Fe, Co)17 materials (R = rare earth)

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dc.contributor.authorCao, YLen_AU
dc.contributor.authorLin, KMen_AU
dc.contributor.authorKhmelevskyi, Sen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorTaddei, KMen_AU
dc.contributor.authorZhang, Qen_AU
dc.contributor.authorHuang, QZen_AU
dc.contributor.authorLi, Qen_AU
dc.contributor.authorKato, Ken_AU
dc.contributor.authorTang, CCen_AU
dc.contributor.authorGibbs, Aen_AU
dc.contributor.authorWang, CWen_AU
dc.contributor.authorDeng, JXen_AU
dc.contributor.authorChen, Jen_AU
dc.contributor.authorZhang, HJen_AU
dc.contributor.authorXing, XRen_AU
dc.date.accessioned2021-09-21T22:52:28Zen_AU
dc.date.available2021-09-21T22:52:28Zen_AU
dc.date.issued2021-07-30en_AU
dc.date.statistics2021-09-14en_AU
dc.description.abstractSuper Invar (SIV), i.e., zero thermal expansion of metallic materials underpinned by magnetic ordering, is of great practical merit for a wide range of high precision engineering. However, the relatively narrow temperature window of SIV in most materials restricts its potential applications in many critical fields. Here, we demonstrate the controlled design of thermal expansion in a family of R2(Fe,Co)17 materials (R=rare Earth). We find that adjusting the Fe-Co content tunes the thermal expansion behavior and its optimization leads to a record-wide SIV with good cyclic stability from 3–461 K, almost twice the range of currently known SIV. In situ neutron diffraction, Mössbauer spectra and first-principles calculations reveal the 3d bonding state transition of the Fe-sublattice favors extra lattice stress upon magnetic ordering. On the other hand, Co content induces a dramatic enhancement of the internal molecular field, which can be manipulated to achieve “ultrawide” SIV over broad temperature, composition and magnetic field windows. These findings pave the way for exploiting thermal-expansion-control engineering and related functional materials. © 2021 American Physical Societyen_AU
dc.identifier.articlenumber55501en_AU
dc.identifier.citationCao, Y., Lin, K., Khmelevskyi, S., Avdeev, M., Taddei, K. M., Zhang, Q., Huang, Q., Li, Q., Kato, K., Tang, C. C., Gibbs, A., Wang, C.-W., Deng, J., Chen, J., Zhang, H., & Xing, X. (2021). Ultrawide temperature range super-invar behavior of R2(Fe, Co)17 materials (R = rare earth). Physical Review Letters, 127(5), 055501. doi:10.1103/PhysRevLett.127.055501en_AU
dc.identifier.issn1079-7114en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitlePhysical Review Lettersen_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevLett.127.055501en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11762en_AU
dc.identifier.volume127en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectThermal expansionen_AU
dc.subjectPolycrystalsen_AU
dc.subjectFerrimagnetismen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectRare earthsen_AU
dc.subjectIronen_AU
dc.subjectCobalten_AU
dc.titleUltrawide temperature range super-invar behavior of R2(Fe, Co)17 materials (R = rare earth)en_AU
dc.typeJournal Articleen_AU
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