Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy

Stonaha, Paul J.; Manley, Michael E.; Bruno, Nick; Karaman, Ibrahim; Arroyave, Raymundo; Singh, Navdeep; Abernathy, Douglas L.; Chi, Songxue

doi:10.1103/PhysRevB.92.140406

Title: Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy

Abstract

Magnetocaloric (MC) materials present an avenue for chemical-free, solid state refrigeration through cooling via adiabatic demagnetization. We have used inelastic neutron scattering to measure the lattice dynamics in the MC material Ni₄₅Co₅Mn_36.6In_13.4. Upon heating across TC, the material exhibits an anomalous increase in phonon entropy of 0.17 0.04 k_B/atom, which is nine times larger than expected from conventional thermal expansion. We find that the phonon softening is focused in a transverse optic phonon, and we present the results of first-principle calculations which predict a strong coupling between lattice distortions and magnetic excitations.

Authors:

Stonaha, Paul J. ^[1]; Manley, Michael E. ^[1]; Bruno, Nick ^[2]; Karaman, Ibrahim ^[2]; Arroyave, Raymundo ^[2]; Singh, Navdeep ^[3]; Abernathy, Douglas L. ^[1]; Chi, Songxue ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Texas A & M Univ., College Station, TX (United States)
Univ. of Houston, Houston, TX (United States)

Publication Date:: Wed Oct 07 00:00:00 EDT 2015

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1240538

Alternate Identifier(s):: OSTI ID: 1223131

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 92; Journal Issue: 14; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Stonaha, Paul J., Manley, Michael E., Bruno, Nick, Karaman, Ibrahim, Arroyave, Raymundo, Singh, Navdeep, Abernathy, Douglas L., and Chi, Songxue. Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevB.92.140406.

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                    Stonaha, Paul J., Manley, Michael E., Bruno, Nick, Karaman, Ibrahim, Arroyave, Raymundo, Singh, Navdeep, Abernathy, Douglas L., & Chi, Songxue. Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy.  United States.  https://doi.org/10.1103/PhysRevB.92.140406

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                    Stonaha, Paul J., Manley, Michael E., Bruno, Nick, Karaman, Ibrahim, Arroyave, Raymundo, Singh, Navdeep, Abernathy, Douglas L., and Chi, Songxue. Wed .  
"Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy".  United States.  https://doi.org/10.1103/PhysRevB.92.140406.  https://www.osti.gov/servlets/purl/1240538.

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@article{osti_1240538,

  title        = {Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy},

  author       = {Stonaha, Paul J. and Manley, Michael E. and Bruno, Nick and Karaman, Ibrahim and Arroyave, Raymundo and Singh, Navdeep and Abernathy, Douglas L. and Chi, Songxue},

  abstractNote = {Magnetocaloric (MC) materials present an avenue for chemical-free, solid state refrigeration through cooling via adiabatic demagnetization. We have used inelastic neutron scattering to measure the lattice dynamics in the MC material Ni45Co5Mn36.6In13.4. Upon heating across TC, the material exhibits an anomalous increase in phonon entropy of 0.17 0.04 k_B/atom, which is nine times larger than expected from conventional thermal expansion. We find that the phonon softening is focused in a transverse optic phonon, and we present the results of first-principle calculations which predict a strong coupling between lattice distortions and magnetic excitations.},

  doi          = {10.1103/PhysRevB.92.140406},

  journal      = {Physical Review B},

  number       = 14,

  volume       = 92,

  place        = {United States},

  year         = {Wed Oct 07 00:00:00 EDT 2015},

  month        = {Wed Oct 07 00:00:00 EDT 2015}

}

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Works referencing / citing this record:

Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications
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Scheibel, Franziska; Gottschall, Tino; Taubel, Andreas
UNSPECIFIED
DOI: 10.25534/tuprints-00013405

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Title: Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy

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Thermomagnetic and magnetocaloric properties of metamagnetic Ni-Mn-In-Co Heusler alloy in magnetic fields up to 140 kOe journal, January 2014

Magnetocaloric effect in the low hysteresis Ni-Mn-In metamagnetic shape-memory Heusler alloy journal, May 2014

Experimental results on the pressure dependence of the Grüneisen parameter: A review journal, January 1980

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Significance of Off-Center Rattling for Emerging Low-Lying THz Modes in Type-I Clathrates journal, October 2011

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Heavy-impurity resonance, hybridization, and phonon spectral functions in Fe 1 − x M x Si ( M = Ir , Os ) journal, March 2015

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Thermomagnetic and magnetocaloric properties of metamagnetic Ni-Mn-In-Co Heusler alloy in magnetic fields up to 140 kOe
journal, January 2014

Magnetocaloric effect in the low hysteresis Ni-Mn-In metamagnetic shape-memory Heusler alloy
journal, May 2014

Experimental results on the pressure dependence of the Grüneisen parameter: A review
journal, January 1980

Thermodynamically complete equations of state for nickel-titanium alloy
journal, November 2005

Significance of Off-Center Rattling for Emerging Low-Lying THz Modes in Type-I Clathrates
journal, October 2011

Antisymmetric exchange and pseudo Jahn–Teller instability in spin-frustrated metal clusters
journal, July 2007

Phonon localization drives polar nanoregions in a relaxor ferroelectric
journal, April 2014

Recovering hidden Bloch character: Unfolding electrons, phonons, and slabs
journal, February 2013

Heavy-impurity resonance, hybridization, and phonon spectral functions in ${Fe}_{1 - x} M_{x} Si (M = Ir, Os)$
journal, March 2015

Calculating condensed matter properties using the KKR-Green's function method—recent developments and applications
journal, August 2011

Magnon spectrum of transition-metal oxides: Calculations including long-range magnetic interactions using the $LSDA + U$ method
journal, November 2011

Magnons and Magnon-Phonon Interactions in Iron
journal, September 1999

Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications
journal, August 2018

Reversible Martensitic Transformation under Low Magnetic Fields in Magnetic Shape Memory Alloys
journal, January 2017

Influence of austenite ferromagnetism on the elastocaloric effect in a Ni _44.9 Co _4.9 Mn _36.9 In _13.3 metamagnetic shape memory alloy
journal, August 2019

Magnetocaloric materials for refrigeration near room temperature
journal, April 2018

Hysteresis Design of Magnetocaloric Materials-From Basic Mechanisms to Applications
text, January 2018