scholarly journals Quantum oscillations with magnetic hysteresis observed in CeTe3 thin films

2020 ◽  
Vol 117 (7) ◽  
pp. 072403 ◽  
Author(s):  
Mori Watanabe ◽  
Sanghyun Lee ◽  
Takuya Asano ◽  
Takashi Ibe ◽  
Masashi Tokuda ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Hysteresis ◽  
Quantum Oscillations

Transition Metal-Doped ZnO: A Comparison of Optical, Magnetic, and Structural Behavior of Bulk and Thin Films

2006 ◽  
Vol 957 ◽  
Author(s):  
William E. Fenwick ◽  
Matthew H. Kane ◽  
Zaili Fang ◽  
Tahir Zaidi ◽  
Nola Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Transition Metal ◽  
Optical Transmission ◽  
Magnetic Hysteresis ◽  
Structural Quality ◽  
Bulk Crystals ◽  
Transmission Measurements ◽  
Doped Zno ◽  
Metal Doped ◽  
Metal Incorporation

ABSTRACTTransition metal-doped ZnO bulk crystals and thin films have been investigated to determine the effects of transition metal incorporation on optical, magnetic, and structural properties of ZnO. A modified melt growth technique was used to grow bulk Zn1-xMnxO, Zn1-xCoxO, and Zn1-xFexO. Optical transmission measurements show an apparent shift in absorption edge with increasing transition metal incorporation. Raman spectroscopy also shows increasing lattice disorder with increasing transition metal concentration. ZnO thin films doped with Ni, Co, and Gd were grown by metalorganic chemical vapor deposition (MOCVD). While the Co-doped thin films showed antiferromagnetic behavior, magnetic hysteresis was observed in the Ni-doped and Gd-doped thin films. Structural quality was verified with X-ray diffraction (XRD), and optical properties were investigated using room temperature photoluminescence (PL) and optical transmission measurements. Properties of ZnO:TM bulk crystals and thin films are compared and used to discuss possible origins of ferromagnetism in these materials.

Thickness dependent quantum oscillations of transport properties in topological insulator Bi2Te3 thin films

2015 ◽  
Vol 106 (5) ◽  
pp. 053103 ◽  
Author(s):  
E. I. Rogacheva ◽  
A. V. Budnik ◽  
A. Yu. Sipatov ◽  
O. N. Nashchekina ◽  
M. S. Dresselhaus
Keyword(s):  
Thin Films ◽  
Transport Properties ◽  
Topological Insulator ◽  
Quantum Oscillations

scholarly journals Iron-Doped Lithium Tantalate Thin Films Deposited by Magnetron Sputtering: A Study of the Iron Role in the Structure and the Derived Magnetic Properties

Crystals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 50 ◽  
Author(s):  
Sergio David Villalobos Mendoza ◽  
José Trinidad Holguín Momaca ◽  
José Trinidad Elizalde Galindo ◽  
Diana María Carrillo Flores ◽  
Sion Federico Olive Méndez ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Blocking Temperature ◽  
Ferromagnetic Behavior ◽  
Zero Field ◽  
Cooling Curves ◽  
X Ray Diffraction ◽  
Field Cooling

Fe-doped LiTaO3 thin films with a low and high Fe concentration (labeled as LTO:Fe-LC and LTO:Fe-HC, respectively) were deposited by magnetron sputtering from two home-made targets. The dopant directly influenced the crystalline structure of the LiTaO3 thin films, causing the contraction of the unit cell, which was related to the incorporation of Fe3+ ions into the LiTaO3 structure, which occupied Li positions. This substitution was corroborated by Raman spectroscopy, where the bands associated with Li-O bonds broadened in the spectra of the samples. Magnetic hysteresis loops, zero-field cooling curves, and field cooling curves were obtained in a vibrating sample magnetometer. The LTO:Fe-HC sample demonstrates superparamagnetic behavior with a blocking temperature of 100 K, mainly associated with the appearance of Fe clusters in the thin film. On the other hand, a room temperature ferromagnetic behavior was found in the LTO:Fe-LC layer where saturation magnetization (3.80 kAm−1) and magnetic coercivities were not temperature-dependent. Moreover, the crystallinity and morphology of the samples were evaluated by X-ray diffraction and scanning electron microscopy, respectively.

scholarly journals Interplay of structure and charge order revealed by quantum oscillations in thin films of Pr2CuO4±δ

2019 ◽  
Vol 100 (23) ◽  
Author(s):  
Nicholas P. Breznay ◽  
Ian M. Hayes ◽  
Nityan L. Nair ◽  
Toni Helm ◽  
James G. Analytis ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Order ◽  
Quantum Oscillations

Achieving Surface Quantum Oscillations in Topological Insulator Thin Films of Bi2Se3

2012 ◽  
Vol 24 (41) ◽  
pp. 5581-5585 ◽  
Author(s):  
A. A. Taskin ◽  
Satoshi Sasaki ◽  
Kouji Segawa ◽  
Yoichi Ando
Keyword(s):  
Thin Films ◽  
Topological Insulator ◽  
Quantum Oscillations

Magnetic Hysteresis Modeling of Giant Magnetoimpedance Thin Films

2007 ◽  
Vol 5 (1) ◽  
pp. 133-137 ◽  
Author(s):  
H. Hauser ◽  
I. Giouroudi ◽  
J. Steurer ◽  
L. Musiejovsky ◽  
J. Nicolics
Keyword(s):  
Thin Films ◽  
Magnetic Hysteresis ◽  
Giant Magnetoimpedance ◽  
Hysteresis Modeling

scholarly journals Quantum Oscillations in Ferromagnetic (Sb, V) 2 Te 3 Topological Insulator Thin Films

2021 ◽  
pp. 2102107
Author(s):  
Liguo Zhang ◽  
Toni Helm ◽  
Haicheng Lin ◽  
Fengren Fan ◽  
Congcong Le ◽  
...  
Keyword(s):  
Thin Films ◽  
Topological Insulator ◽  
Quantum Oscillations

Size Effects in Bi-Sb Solid Solutions Thin Films

2011 ◽  
Vol 1314 ◽  
Author(s):  
Elena I. Rogacheva ◽  
Dar’ya S. Orlova ◽  
Mildred S. Dresselhaus ◽  
Shuang Tang
Keyword(s):  
Thin Films ◽  
Solid Solutions ◽  
Room Temperature ◽  
Thermal Evaporation ◽  
Theoretical Calculations ◽  
Thermoelectric Power Factor ◽  
Quantum Oscillations ◽  
Kinetic Coefficients ◽  
Temperature Dependences ◽  
Good Agreement

ABSTRACTThe room-temperature dependences of the electrical conductivity σ, Seebeck coefficient S, Hall coefficient RH, and the thermoelectric power factor P on the thickness (d=10–300 nm) of the thin films grown on mica substrates by thermal evaporation in vacuum of Bi-Sb solid solutions crystals with 4.5 at.% Sb were obtained. It was established that an increase in d up to ~ 200 nm leads to a change in kinetic coefficients and that in the thickness dependences of the thermoelectric properties, quantum oscillations were observed. It was shown that the monotonic component of the σ(T) dependence can be satisfactorily approximated by theoretical calculations based on the classical Fuchs - Sondheimer theory. The theoretically estimated period of oscillations is in a good agreement with the experimentally observed period.

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