Magnetic coercivity control by heat treatment in Heusler Ni-Mn-Ga(-B) single crystals

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00509151" target="_blank" >RIV/68378271:_____/19:00509151 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/19:10399607
Result on the web
<a href="http://hdl.handle.net/11104/0299923" target="_blank" >http://hdl.handle.net/11104/0299923</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.actamat.2019.02.045" target="_blank" >10.1016/j.actamat.2019.02.045</a>

Result language
angličtina
Original language name
Magnetic coercivity control by heat treatment in Heusler Ni-Mn-Ga(-B) single crystals
Original language description
The combination of enlarged magnetic coercivity and magnetic shape memory (MSM) functionality is essential for novel magnetomechanical effects in MSM alloys. We found that increasing the density of thermal antiphase boundaries (APBs) provides a method to increase the magnetic coercivity without deteriorating the MSM functionality. APB density was controlled by different heat treatments in Ni–Mn–Ga (–B) MSM single crystals with five-layered modulated martensite structure. Slow cooling ∼1 K/min of Ni–Mn–Ga through the B2′–L21 transition resulted in a low density ( < 1/micrometer) of APBs observed by magnetic force microscopy and low coercivity <2 mT. Water quenching resulted in fine magnetic and APB patterns and enlarged the coercivity to 24 mT at room temperature, and this further increased with decreasing temperature up to 41 mT at 10 K.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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