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Title: Tailoring Charge Transport and Magnetism in Complex Half-Heusler/Full-Heusler Nanocomposites

Abstract

This project exploits (1) the facile co-crystallization of the half-Heusler (HH) and full-Heusler (FH) structures, (2) the high coherency and stability of the HH/FH interfaces, and (3) the solid-state inter-conversion between HH and FH structures through local atomic diffusion, to investigate, for selected compositions of the HH and FH phases, the effect of size, dimensionality, dispersion and volume fraction of FH nanostructures on the electronic, phonon and magnetic behavior of the resulting HH/FH nanocomposites. Our goal is to identify and control key material and growth parameters governing phase formation, microstructural evolution, and to understand the mechanism by which these changes of the internal structure modify the material’s performance. To elucidate the mechanism by which the FH nanostructures regulate electronic charge transport and induce ferromagnetism within non-magnetic and magnetic semiconducting HH matrices, suitable series of HH/0D-FH and HH/2D-FH nanocomposites will be fabricated using synthesis conditions suggested by theoretical calculations of the formation energy and stability of various FH phases (varying M) in HH matrices with known chemical composition. The structure of the HH/FH interfaces (size, chemical composition, volume fraction and dispersion) will be investigated along with the evaluation of the electronic (carrier density, mobility, thermopower, electrical conductivity, effective mass), thermal andmore » magnetic (susceptibility, magnetization etc.) properties of the resulting HH/FH nanocomposites.« less

Authors:
 [1];  [2];  [3]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  3. Univ. of California, Santa Barbara, CA (United States). Dept. of Materials
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1581734
Report Number(s):
1
DOE Contract Number:  
SC0008574
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Thermoelectric, Phase transformation, Nanostructures, Magnetism, half-Heusler, full-Huesler

Citation Formats

Poudeu, Pierre Ferdinand, Uher, Ctirad, and Van der Ven, Anton. Tailoring Charge Transport and Magnetism in Complex Half-Heusler/Full-Heusler Nanocomposites. United States: N. p., 2020. Web. doi:10.2172/1581734.
Poudeu, Pierre Ferdinand, Uher, Ctirad, & Van der Ven, Anton. Tailoring Charge Transport and Magnetism in Complex Half-Heusler/Full-Heusler Nanocomposites. United States. doi:10.2172/1581734.
Poudeu, Pierre Ferdinand, Uher, Ctirad, and Van der Ven, Anton. Thu . "Tailoring Charge Transport and Magnetism in Complex Half-Heusler/Full-Heusler Nanocomposites". United States. doi:10.2172/1581734. https://www.osti.gov/servlets/purl/1581734.
@article{osti_1581734,
title = {Tailoring Charge Transport and Magnetism in Complex Half-Heusler/Full-Heusler Nanocomposites},
author = {Poudeu, Pierre Ferdinand and Uher, Ctirad and Van der Ven, Anton},
abstractNote = {This project exploits (1) the facile co-crystallization of the half-Heusler (HH) and full-Heusler (FH) structures, (2) the high coherency and stability of the HH/FH interfaces, and (3) the solid-state inter-conversion between HH and FH structures through local atomic diffusion, to investigate, for selected compositions of the HH and FH phases, the effect of size, dimensionality, dispersion and volume fraction of FH nanostructures on the electronic, phonon and magnetic behavior of the resulting HH/FH nanocomposites. Our goal is to identify and control key material and growth parameters governing phase formation, microstructural evolution, and to understand the mechanism by which these changes of the internal structure modify the material’s performance. To elucidate the mechanism by which the FH nanostructures regulate electronic charge transport and induce ferromagnetism within non-magnetic and magnetic semiconducting HH matrices, suitable series of HH/0D-FH and HH/2D-FH nanocomposites will be fabricated using synthesis conditions suggested by theoretical calculations of the formation energy and stability of various FH phases (varying M) in HH matrices with known chemical composition. The structure of the HH/FH interfaces (size, chemical composition, volume fraction and dispersion) will be investigated along with the evaluation of the electronic (carrier density, mobility, thermopower, electrical conductivity, effective mass), thermal and magnetic (susceptibility, magnetization etc.) properties of the resulting HH/FH nanocomposites.},
doi = {10.2172/1581734},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}