High field transitions in (Fe, T)3Ga4 alloys

Al-Kanani, H.J.; Booth, J. G.

doi:10.1016/0921-4526(94)00951-q

Cited by 12 publications

(16 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No field transition is seen and as the temperature is increased the materials become paramagnetic at much lower temperatures than the Mn, Cr and V substitutions. 5,6 In fact the effect of Ni substitution seems to be quite similar to that of Co reported by Kawamiya and Adachi. 5 Ti substitution, however, produces a different effect from the other substitutions, i.e., a ferromagnetic ground state.…”

Section: Resultssupporting

confidence: 82%

“…5,6 In fact the effect of Ni substitution seems to be quite similar to that of Co reported by Kawamiya and Adachi. 5 Ti substitution, however, produces a different effect from the other substitutions, i.e., a ferromagnetic ground state. As the temperature is increased the ferromagnetic behavior disappears and the material transforms into another magnetic state for which a field transition is seen.…”

Section: Resultssupporting

confidence: 82%

“…The transition from the ferromagnetic to the antiferromagnetic state occurs through a coexistence canted state. For the Mn, V, and Cr substitutions, 5,6 at low values of x the initial antiferromagnetic phase is transformed through an intermediate coexistence canted phase to a ferromagnetic phase.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys

Al-Kanani¹,

Booth²,

Ko³

2000

Journal of Applied Physics

View full text Add to dashboard Cite

The magnetic ordering in the series of transition metal alloys (Fe1−xTx)3Ga4 with T=Ni and Ti having values of x in the range 0.05⩽x⩽0.20 has been investigated at high fields and low temperatures. Magnetization measurements revealed that in contrast to other T substitutions, Ni and Ti induce completely different types of effects on the magnetic properties. In the case of Ni substitution a ferrimagnetic-like type of magnetic order is induced at low compositions and low temperatures and Ti produces a ferromagnetic ground state. For Ti alloys with low composition as the temperature is increased a field induced transition starts to appear at about 50 K which persists up to room temperature suggesting a phase transition from a ferromagnetic to an antiferromagnetic state. The phase diagrams of the Ni and Ti system are explainable in terms of the Moriya-Usami and Isoda theories. Preliminary neutron diffraction measurements on the Ni alloys carried out at ILL suggest the existence of short-range order over a certain temperature range. The behavior observed so far on the various substituted systems leads us to believe that there is a clear relation between the magnetic properties and the relative position of the substitution element with respect to Fe in the Periodic Table.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 82%

See 1 more Smart Citation

Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys

Al-Kanani¹,

Booth²,

Ko³

2000

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…This behavior has been explained by Moriya and Usami’s theory, which predicts coexistence of FM and AFM states in itinerant electron systems1314. To investigate these peculiar magnetic and structural behaviors, several chemical substitution studies have been performed on both Fe and Ga sublattices15161718. In particular, it has been recently reported that when grown by the alternative deposition of Fe 3 GaAs and GaAs on a GaAs (001) substrate, the Fe 3 Ga 4 compound presents a distinctive photo-enhanced magnetization at room temperature19.…”

mentioning

confidence: 89%

Dimensionality tuning of the electronic structure in Fe3Ga4 magnetic materials

Moura

Oliveira

Rosa

et al. 2016

Sci Rep

View full text Add to dashboard Cite

This work reports on the dimensionality effects on the magnetic behavior of Fe3Ga4 compounds by means of magnetic susceptibility, electrical resistivity, and specific heat measurements. Our results show that reducing the Fe3Ga4 dimensionality, via nanowire shape, intriguingly modifies its electronic structure. In particular, the bulk system exhibits two transitions, a ferromagnetic (FM) transition temperature at T1 = 50 K and an antiferromagnetic (AFM) one at T2 = 390 K. On the other hand, nanowires shift these transition temperatures, towards higher and lower temperature for T1 and T2, respectively. Moreover, the dimensionality reduction seems to also modify the microscopic nature of the T1 transition. Instead of a FM to AFM transition, as observed in the 3D system, a transition from FM to ferrimagnetic (FERRI) or to coexistence of FM and AFM phases is found for the nanowires. Our results allowed us to propose the magnetic field-temperature phase diagram for Fe3Ga4 in both bulk and nanostructured forms. The interesting microscopic tuning of the magnetic interactions induced by dimensionality in Fe3Ga4 opens a new route to optimize the use of such materials in nanostructured devices.

show abstract

“…15 Previous studies on Fe 3 Ga 4 have indicated that it displays multiple magnetic transitions from a ferromagnetic (FM) ground state to an intermediate AFM phase at 68 K to a re-entrant FM phase at 360 K, and a transition at 420 K to a paramagnetic (PM) state. 14,[16][17][18] The high temperature transition from AFM to FM at 360 K is of particular interest due to its proximity to room temperature as well as the unknown nature of the intermediate AFM phase. 19,20 Recent work has shown evidence that the FM ground state and reentrant FM state between 360 K and 420 K are the same state which means the intermediate AFM state is formed through a instability in the FM ground state.…”

Section: Introductionmentioning

confidence: 99%

Altering the magnetic ordering of Fe$_{3}$Ga$_{4}$ via thermal annealing and hydrostatic pressure

Wilfong¹,

Sharma²,

Naphy³

et al. 2021

Preprint

View full text Add to dashboard Cite

The effects of post-synthesis annealing temperature on arc-melted samples of Fe3Ga4 has been studied to investigate changes in crystallographic and magnetic properties induced by annealing. Results show a significant trend in the evolution of the (incommensurate spin density wave) ISDW-FM (ferromagnetic) transition temperature as a function of the refined unit cell volume in annealed samples. Strikingly, this trend allowed for the tuning of the transition temperature down to roomtemperature (300 K) whilst maintaining a sharp transition in temperature, opening the door to the use of Fe3Ga4 in functional devices. Crystallographic analysis through Rietveld refinement of highresolution x-ray diffraction data has showed that arc-melted stoichiometric Fe3Ga4 is multi-phase regardless of annealing temperature with a minor phase of FeGa3 decreasing in phase fraction at higher annealing temperature. In order to validate the trend in ISDW-FM transition temperature with regard to unit cell volume, high pressure magnetometry was performed. This showed that the FM-ISDW (∼ 68 K) and ISDW-FM (∼ 360 K) transition temperatures could be tuned, increased and decreased respectively, linearly with external pressure. Thus, external pressure and the ensuing crystallographic changes minimize the temperature range of the stability of the ISDW pointing toward the importance of structural properties on the mechanism for the formation of the intermediate ISDW phase. These results show how this model system can be tuned as well as highlighting the need for future high-pressure crystallography and related single crystal measurements to understand the mechanism and nature of the intermediate ISDW phase to be exploited in future devices.

show abstract

High field transitions in (Fe, T)3Ga4 alloys

Cited by 12 publications

References 3 publications

Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys

Magnetic phase transitions in (Fe1−xTx)3Ga4 alloys

Dimensionality tuning of the electronic structure in Fe3Ga4 magnetic materials

Altering the magnetic ordering of Fe$_{3}$Ga$_{4}$ via thermal annealing and hydrostatic pressure

Contact Info

Product

Resources

About