Negative thermal expansion of Ni-doped MnCoGe around room temperature - magnetic tuning

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dc.contributor.authorRen, QYen_AU
dc.contributor.authorHutchinson, WDen_AU
dc.contributor.authorWang, JLen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorWang, Gen_AU
dc.contributor.authorZhou, Hen_AU
dc.contributor.authorMa, Jen_AU
dc.contributor.authorCampbell, SJen_AU
dc.date.accessioned2022-08-30T01:52:00Zen_AU
dc.date.available2022-08-30T01:52:00Zen_AU
dc.date.issued2019-02-05en_AU
dc.date.statistics2021-10-12en_AU
dc.description.abstractSeveral materials have been shown to exhibit abnormal contraction with increasing temperature; the phenomenon of negative thermal expansion (NTE). Given this special property, NTE materials fulfill important functions in many modern technologies, such as electrodes of fuel cell, organic light-emitting diode (OLED), optical fibre, as well as high precision electronics and optical mirrors. In general, Nate properties are associated with local structural distortions or phase transitions, such as transverse phonon vibration in rigid unit modes, exile network of metal-organic framework, charge transfer, magneto-volume effect, ferroelectric transition, as well as displacive phase transition. Control or manipulation of Nate properties have become topics of increasing importance over the past two decades. Effective methods to produce materials with Nate properties include chemical doping, nanostructuralization, hydration and applied pressure. Recently, MoCoGe-based compounds were considered as a group of materials that exhibit giant NTE, with this behaviour attributed to the displacive martensitic phase transformation. In this investigation, we reported a new method to manipulate the NTE properties using applied magnetic fields. It is found that doping of 5% Ni on the Mn site could bring about a magneto-structural (MS) coupling in MnCoGe-based compounds. Magnetic-field-dependent neutron diffraction measurements demonstrated that an 8 T magnetic field could suppress the NTE by 31% at 295 K through this MS coupling.en_AU
dc.identifier.citationRen, Q., Hutchison, W., Wang, J., Studer, A., Wang, G., .Zhou, H., Ma, J, & Campbell, S. (2019). Negative thermal expansion of Ni-doped MnCoGe around room temperature - magnetic tuning. Poster presented to the 43rd Annual Condensed Matter and Materials Meeting Charles Sturt University, Wagga Wagga, NSW 5th February - 8th February, 2019, (pp. 90). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2019/Wagga_2019_Conference_Handbook.pdfen_AU
dc.identifier.conferenceenddate8 February 2019en_AU
dc.identifier.conferencename43rd Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate5 February 2019en_AU
dc.identifier.pagination90en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2019/Wagga_2019_Conference_Handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13671en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectCouplingen_AU
dc.subjectDoped materialsen_AU
dc.subjectMagnetic fieldsen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectMaterialsen_AU
dc.subjectNickelen_AU
dc.subjectPhase transformationsen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectThermal expansionen_AU
dc.titleNegative thermal expansion of Ni-doped MnCoGe around room temperature - magnetic tuningen_AU
dc.typeConference Posteren_AU
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