Growth diagram and magnetic properties of hexagonal LuFe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>thin films

Wang, Wenbin; Gai, Zheng; Chi, Miaofang; Fowlkes, Jason D.; Yi, Jaichul; Zhu, Leyi; Cheng, Xuemei; Keavney, D. J.; Snijders, Paul C.; Ward, Thomas Z.; Shen, Jian; Xu, Xiaoshan

doi:10.1103/physrevb.85.155411

Cited by 27 publications

(27 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Supersaturation Δμ is the chemical potential difference of adatoms transitioning from their quasi‐vapor phase (the mobile adatoms on the surface and the background oxygen in the gas phase) near the substrate to their solid phase on the substrate. Below B3 the growth is non‐stoichiometric due to the inability of completing the thermo‐chemical transition from the quasi‐vapor phase to the solid phase of the intended compound 39. Above B3 the film can be grown with the right stoichiometry.…”

Section: Atomic‐level Control and Structure Of Surface Of Stronglymentioning

confidence: 99%

In Situ Observations and Tuning of Physical and Chemical Phenomena on the Surfaces of Strongly Correlated Oxides

Gai¹,

Kalinin²,

Li³

et al. 2013

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

The characteristic aspect of strongly correlated oxides systems is the strong coupling between the structural, electronic and magnetic properties. A small change in one property can produce a large change in another. Controllable surface tuning provides the opportunity to study how structural, electronic, and magnetic properties respond to the broken symmetry and opens avenues for exploration of completely new physical properties. The extreme sensitivity of properties to external chemical and physical stimuli makes in situ characterization a requirement for controlled tuning of complex correlated materials. This paper reviews some recent progress in in situ observations and tuning of physical and chemical phenomena on the surfaces of strongly correlated oxides thin fi lms and crystals, including atomic-level structural studies, control, and tuning of the physical properties. FEATURE ARTICLEchemistry at different temperature are discussed; also mentioned is the direct observation of doped holes and their correlation to the magnetic and transport behaviors of manganites. Controllable surface tuning is demonstrated through chemical environment or local or global stresses. Water, oxygen and external strain are shown to defi ne both structure and properties of oxide interfaces and can be employed as a means to control static and dynamic distributions of electrons and atoms.www.afm-journal.de www.MaterialsViews.com wileyonlinelibrary.com

show abstract

Section: Atomic‐level Control and Structure Of Surface Of Stronglymentioning

confidence: 99%

In Situ Observations and Tuning of Physical and Chemical Phenomena on the Surfaces of Strongly Correlated Oxides

Gai¹,

Kalinin²,

Li³

et al. 2013

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The ability to deposit single-crystal thin films of LuFe 2 O 4 is a key stepping stone on the path to understanding and manipulating the properties of this material, for example, with strain. 8,9 There has been some success with growing thin films of LuFe 2 O 4 by pulsed-laser deposition (PLD), [10][11][12] though so far this achievement is limited to polycrystalline films or films with impurity phases present, particularly at the interface. In these cases, the desired LuFe 2 O 4 phase only forms with excess iron present during growth by PLD.…”

mentioning

confidence: 99%

The adsorption-controlled growth of LuFe2O4 by molecular-beam epitaxy

Brooks¹,

Misra²,

Mundy³

et al. 2012

Applied Physics Letters

View full text Add to dashboard Cite

We report the growth of single-phase (0001)-oriented epitaxial films of the purported electronically driven multiferroic, LuFe2O4, on (111) MgAl2O4, (111) MgO, and (0001) 6H-SiC substrates. Film stoichiometry was regulated using an adsorption-controlled growth process by depositing LuFe2O4 in an iron-rich environment at pressures and temperatures where excess iron desorbs from the film surface during growth. Scanning transmission electron microscopy reveals reaction-free film-substrate interfaces. The magnetization increases rapidly below 240 K, consistent with the paramagnetic-to-ferrimagnetic phase transition of bulk LuFe2O4. In addition to the ∼0.35 eV indirect band gap, optical spectroscopy reveals a 3.4 eV direct band gap at the gamma point.

show abstract

“…A good crystallographic orientation of f = 0.80 is achieved for the film heat treated at 900 • C. By the way, epitaxial RFe 2 O 4 films grown by MBE 7 and PLD 5,[8][9][10] techniques showed the perfect (001)-orientation. It is worth to mention that the highly (001)-orientation of spin coated films is nearly comparable to that of MBE and PLD films.…”

Section: Resultsmentioning

confidence: 80%

“…magnetic hysteresis because of the ferrimagnetic transition of YbFe 2 O 4 , although the observed M S of 22 emu/cm 3 is less than the reported bulk value of ∼80 emu/cm 3 at 20.5 kOe and 180 K. 15 A lower M S value in thin films than the bulk value has also be observed in LuFe 2 O 4 prepared by the MBE method. 7 The magnetic properties of RFe 2 O 4 are known to be sensitive to various factors, such as oxygen nonstoichiometry, 16 lattice strain, 17 impurities, 8 and the magnetic field experienced by the specimens. 18 From the presence of a clear ferrimagnetic transition in the magnetization curves, it can concluded that the YbFe 2 O 4 films prepared by spin coating have favorable crystalline properties.…”

Section: Resultsmentioning

confidence: 99%

“…However, compared with the large amount of effort devoted to investigate bulk RFe 2 O 4 , there are only a small number of studies attempting to grow thin films. [5][6][7][8][9][10] Only one group has succeeded in fabricating well-defined and single-crystalline LuFe 2 O 4 films using the molecular-beam epitaxy (MBE) technique. 7 And very recently, single-crystalline growth of YbFe 2 O 4 films on yttria-stabilized zirconia (YSZ) (111) substrates was achieved by pulsed-laser deposition (PLD).…”

Section: -2mentioning

confidence: 99%

See 1 more Smart Citation

Structural, magnetic and optical properties of Y bFe2O4 films deposited by spin coating

et al. 2016

View full text Add to dashboard Cite

Rare-earth iron oxides (RFe2O4) have attracting attention as new electronic device materials because of their numerous functionalities, such as electronic ferroelectricity, ferrimagnetism, and high infrared absorption. In this paper, nearly monophasic Y bFe2O4 films were prepared on α-Al2O3(001) substrates by the spin coating method using an aqueous-based Y bFe2O4 solution. The solution was composed of a stoichiometric ratio of Y b(CH3COO)3 and Fe(NO3)3 with excess chelating agents. After heat treatment above 800 °C, well-crystallized and highly (001)-oriented Y bFe2O4 started to epitaxially form on the substrate under controlled oxygen partial pressure with H2/CO2 gas mixtures. X-ray pole figure analysis confirmed the following epitaxial relationship: Y bFe2O4[100](001)//α-Al2O3[100](001). Moreover formation of an Fe3O4 interracial layer between Y bFe2O4 and α-Al2O3 was detected by high-resolution transmission electron microscopy. Presence of the Fe3O4 interracial layer seemed to release the lattice misfit with the substrate. The Fe2+/Fe3+ ratio in the obtained Y bFe2O4 films was nearly stoichiometric and the indirect bandgap assigned to Fe2+ → Fe3+ charge transfer excitation was found to be ∼0.4 eV by optical spectroscopy. A clear magnetic transition from the paramagnetic state to the ferrimagnetic state occurred at ∼230 K.

show abstract

Growth diagram and magnetic properties of hexagonal LuFe2O4thin films

Cited by 27 publications

References 26 publications

In Situ Observations and Tuning of Physical and Chemical Phenomena on the Surfaces of Strongly Correlated Oxides

In Situ Observations and Tuning of Physical and Chemical Phenomena on the Surfaces of Strongly Correlated Oxides

The adsorption-controlled growth of LuFe2O4 by molecular-beam epitaxy

Structural, magnetic and optical properties of Y bFe2O4 films deposited by spin coating

Contact Info

Product

Resources

About