Slater-Pauling behavior in LiMgPdSn-type multifunctional quaternary Heusler materials: Half-metallicity, spin-gapless and magnetic semiconductors

Özdoğan, K.; Şaşıoğlu, E.; Galanakis, I.

doi:10.1063/1.4805063

Cited by 347 publications

(186 citation statements)

References 35 publications

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“…HMF nature is found to be preserved under small amounts of structural disorder, while it changes to metallic antiferromagnetic state beyond a certain excess Al in the alloy. Ӧzdogan et al [31] also predicted HMF nature for CoMnCrAl alloy.…”

Section: Comncral Cofetial and Comnval Alloysmentioning

confidence: 94%

“…Xu et al [30], also studied the CoFeCrAl alloy using ab-initio calculations and referred it a SGS material. Ӧzdogan et al [31] also predicted CoFeCrAl as having SGS nature, while HMF behavior was predicted for CoFeCrSi.…”

Section: B Cofecrz (Z = Al Ga Si and Ge) Alloysmentioning

confidence: 99%

“…Both CoFeTiAl and CoMnVAl were found to have non spin-polarized band structure [51]. Ӧzdogan et al [31] Alijani et al [55], calculated the electronic structure of NiCoMnGa alloy. The spin-polarized band structure and DoS calculations were performed with the most stable structural configuration and it was found to exhibit a HMF ground state.…”

Section: Comncral Cofetial and Comnval Alloysmentioning

confidence: 99%

“…The results of these calculations are summarized in the table 4. Ӧzdogan et al [31], also performed ab-initio calculations on various EQHA systems in order to understand their HMF and/or SGS properties. Table 4 summarized the results of theoretical calculations on different EQHA systems.…”

Section: G Other Equiatomic Quaternary Heusler Alloysmentioning

confidence: 99%

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Equiatomic quaternary Heusler alloys: A material perspective for spintronic applications

Bainsla

Суреш

2016

Applied Physics Reviews

266

104

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Half-metallic ferromagnetic (HMF) materials show high spin polarization and are therefore interesting to researchers due to their possible applications in spintronic devices. In these materials, while one spin sub band has a finite density of states at the Fermi level, the other sub band has a gap. Because of their high Curie temperature (TC) and tunable electronic been reported in a few systems, which are also discussed in this review. Thus, this review presents a consolidated picture of the magnetic and spintronic properties of this important, but relatively new class of Heusler alloys. It is expected that this will stimulate further interest in these alloys, thereby paving the way for the identification of more HMF and SGS materials. As a result of this, it is expected that more efficient spintronic devices using these alloys would emerge in the near future.

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Section: Comncral Cofetial and Comnval Alloysmentioning

confidence: 94%

Section: B Cofecrz (Z = Al Ga Si and Ge) Alloysmentioning

confidence: 99%

Section: Comncral Cofetial and Comnval Alloysmentioning

confidence: 99%

Section: G Other Equiatomic Quaternary Heusler Alloysmentioning

confidence: 99%

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Equiatomic quaternary Heusler alloys: A material perspective for spintronic applications

Bainsla

Суреш

2016

Applied Physics Reviews

266

104

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“…A 1:1:1:1 stoichiometric structure arises when one X is replaced by a more or less electronegative, transition metal element, forming a Y -type structure (F43m space group, #216) -or equiatomic quaternary HAs. [17][18][19][20][21][22][23][24][25] Neutron diffraction experiment on Co 2 MnSi show 14% of Mn sites are occupied by Co and 5-7% of Co sites by Mn. 3 Similar results were observed by EXAFS.…”

Section: Introductionmentioning

confidence: 99%

Half-metallic Co-based quaternary Heusler alloys for spintronics: Defect- and pressure-induced transitions and properties

et al. 2016

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Heusler compounds offer potential as spintronic devices due to their spin-polarization and halfmetallicity properties, where electron spin-majority (minority) manifold exhibits states (band gap) at the electronic chemical potential, yielding full spin-polarization in a single manifold. Yet, Heuslers often exhibit intrinsic disorder that degrades its half-metallicity and spin-polarization. Using densityfunctional theory, we analyze the electronic and magnetic properties of equiatomic Heusler (L21) CoMnCrAl and CoFeCrGe alloys for effects of hydrostatic pressure and intrinsic disorder (thermal antisites, binary swaps, and vacancies). Under pressure, CoMnCrAl undergoes a metallic transition, while half-metallicity in CoFeCrGe is retained for a limited range. Antisite disorder between Cr-Al pair in CoMnCrAl alloy is energetically the most favorable, and retain half-metallic character in Crexcess regime. However, Co-deficient samples in both alloys undergo a transition from half-metallic to metallic, with a discontinuity in the saturation magnetization. For binary swaps, configurations that compete with the ground state are identified and show no loss of half-metallicity; however, the minority-spin bandgap and magnetic moments vary depending on the atoms swapped. For single binary swaps, there is a significant energy cost in CoMnCrAl but with no loss of half metallicity. Although a few configurations in CoFeCrGe energetically compete with the ground state, however the minority-spin bandgap and magnetic moments vary depending on the atoms swapped. These informations should help in controlling these potential spintronic materials.PACS numbers: 31.15. 75.50.Cc,

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Hydrogen effect on half‐metallic and thermoelectric properties of CoRhMnSi [001] film

et al. 2021

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Quaternary Heusler alloys (QHAs) with their unique properties have the ability to absorb and store hydrogen to be used as hydrogen storage sources. In the present work, based on the calculations of the density theory of the effects of hydrogen adsorption on the properties of the half-metal and the electron transport behavior of the thin film CoRhMnSi alloy [001] was investigated. CoRhMnSi is a ferromagnetic half-metallic compound that crystallizes in a LiMgPdSn-type cube structure and only its two phases [001] named β and γ under hydrogen adsorption still retain their metallic properties with band gaps of 0.81 and 0.39 eV in the minor spin, have maintained. Examination of thermodynamic phase diagrams shows that these films are stable in thermodynamic conditions. Investigation of thermoelectric properties of these compounds also shows that the highest figure of merit values of 0.99 for the CoRhMnSi bulk and 0.81 for the γ phase occurs in the room temperature range.

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Slater-Pauling behavior in LiMgPdSn-type multifunctional quaternary Heusler materials: Half-metallicity, spin-gapless and magnetic semiconductors

Cited by 347 publications

References 35 publications

Equiatomic quaternary Heusler alloys: A material perspective for spintronic applications

Equiatomic quaternary Heusler alloys: A material perspective for spintronic applications

Half-metallic Co-based quaternary Heusler alloys for spintronics: Defect- and pressure-induced transitions and properties

Hydrogen effect on half‐metallic and thermoelectric properties of CoRhMnSi [001] film

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