Compliant Lattice Modulations Enable Anomalous Elasticity in Ni-Mn-Ga Martensite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F24%3A00598952" target="_blank" >RIV/61388998:_____/24:00598952 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/24:00598952 RIV/68407700:21340/24:00378091
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/adma.202406672" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adma.202406672</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adma.202406672" target="_blank" >10.1002/adma.202406672</a>
Alternative languages
Result language
angličtina
Original language name
Compliant Lattice Modulations Enable Anomalous Elasticity in Ni-Mn-Ga Martensite
Original language description
High mobility of twin boundaries in modulated martensites of Ni–Mn–Ga-based ferromagnetic shape memory alloys holds a promise for unique magnetomechanical applications. This feature has not been fully understood so far, and in particular, it has yet not been unveiled what makes the lattice mechanics of modulated Ni–Mn–Ga specifically different from other martensitic alloys. Here, results of dedicated laser-ultrasonic measurements on hierarchically twinned five-layer modulated (10M) crystals fill this gap. Using a combination of transient grating spectroscopy and laser-based resonant ultrasound spectroscopy, it is confirmed that there is a shear elastic instability in the lattice, being significantly stronger than in any other martensitic material and also than what the first-principles calculations for Ni–Mn–Ga predict. The experimental results reveal that the instability is directly related to the lattice modulations. A lattice-scale mechanism of dynamic faulting of the modulation sequence that explains this behavior is proposed, this mechanism can explain the extraordinary mobility of twin boundaries in 10M.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Materials
ISSN
0935-9648
e-ISSN
1521-4095
Volume of the periodical
36
Issue of the periodical within the volume
39
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
2406672
UT code for WoS article
001288420900001
EID of the result in the Scopus database
2-s2.0-85200991594