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Investigations of the complex behavior of the magnetization of manganese arsenide thin films due to defects induced by irradiation of slow heavy ions are presented. In addition to the thermal hysteresis suppression already highlighted in M.…

The influence of uncorrelated (nonmagnetic) overlayers on the magnetic properties of thin itinerant-electron films is investigated within the single-band Hubbard model. The Coulomb correlation between the electrons in the ferromagnetic…

强关联电子 · 物理学 2009-10-31 J. H. Wu , T. Herrmann , W. Nolting

Spin coating technique was employed to fabricate CuO films at different spin speeds for different time duration, and they were annealed at different temperatures for different time durations in air. These thin films were characterized using…

应用物理 · 物理学 2018-06-12 P. Samarasekara , N. G. K. V. M. Premasiri

The coercivity of La$_{1-x}$Sr$_x$MnO$_3$ thin films can be enhanced by Ru substitution for Mn. In order to elucidate its mechanism, we performed soft x-ray absorption and magnetic circular dichroism measurements at the Ru M$_{2,3}$ and Mn…

In orthoferrites the rare-earth (R) ion has a big impact on structural and magnetic properties in particular the ionic size influences the octahedral tilt and the R3+- Fe3+ interaction modifies properties like the spin reorientation. Growth…

We investigate the thickness effects on charge and magnetic orderings in Fe perovskite oxide La1/3Sr2/3FeO3/SrTiO3 thin films by hard x-ray and resonant soft x-ray scattering (RSXS) with changing thin film thickness systematically. We found…

We measured the temperature dependence of the saturation magnetization (Ms) of a (La1-xPrx)1-yCayMnO3 (x ~ 0.60, y ~ 0.33) film as a function of applied bending stress. Stress producing a compressive strain of -0.01% along the magnetic easy…

强关联电子 · 物理学 2014-11-18 Surendra Singh , M. R. Fitzsimmons , T. Lookman , H. Jeen , A. Biswas

The dielectric constant of the incipient ferroelectric EuTiO$_3$ exhibits a sharp decrease at about 5.5K, at which temperature antiferromagnetic ordering of the Eu spins simultaneously appears, indicating coupling between the magnetism and…

材料科学 · 物理学 2009-11-07 Qing Jiang , Hua Wu

We report on a systematic study of strain effects on the transport properties and the ferromagnetic transition temperature $T_{c}$ of high-quality La$_{0.9}$Sr$_{0.1}$MnO$_{3}$ thin films epitaxially grown on (100) SrTiO$_{3}$ substrates.…

材料科学 · 物理学 2009-11-07 X. J. Chen , S. Soltan , H. Zhang , H. -U. Habermeier

EuTiO3, a band insulator, and LaTiO3, a Mott insulator, are both antiferromagnetic with transition temperatures ~ 5.5 K and ~ 160 K, respectively. Here, we report the synthesis of Eu1-xLaxTiO3 thin films with x = 0 to 1 by oxide molecular…

强关联电子 · 物理学 2020-06-24 Hyungki Shin , Chong Liu , Fengmiao Li , Ronny Sutarto , Bruce A. Davidson , Ke Zou

We demonstrate the evolution of the micro-patterned magnetic domains in CoPd thin films pretreated with e-beam lithography and O2 plasma. During the days-long oxidation, significantly different behaviors of the patterned magnetic domains…

材料科学 · 物理学 2021-11-11 Wei-Hsiang Wang , Chak-Ming Liu , Tzu-Hung Chuang , Der-Hsin Wei , Wen-Chin Lin , Pei-hsun Jiang

We report a clear correspondence between changes in the Curie temperature and carrier density upon annealing in epitaxially grown (Ga,Mn)As layers with thicknesses in the range between 5 nm and 20 nm. The changes are dependent on the layer…

材料科学 · 物理学 2009-11-07 B. Sorensen , J. Sadowski , R. Mathieu , P. Svedlindh , P. E. Lindelof

Investigations into the magnetic properties of sputtered Mn$_{x}$CoGe films in the range $0.8 \leq x \leq 2.5$ uncovered ferrimagnetic order, unlike the ferromagnetic order reported in bulk samples. These films formed hexagonal…

Magnetometry measurements of Fe/U and Ni/U bilayer systems reveal a non-monotonic dependence of the magnetic anisotropy for U thicknesses in the range 0 nm - 8 nm, with the Fe/U bilayers showing a more prominent effect as compared to Ni/U.…

介观与纳米尺度物理 · 物理学 2021-03-24 E. R. Gilroy , M. -H. Wu , M. Gradhand , R. Springell , C. Bell

Neodymium is a remarkable active component in numerous magnetic alloys that are used in various applications. However, the application of bare neodymium thin film is limited due to the lack of information about its electrical and magnetic…

材料科学 · 物理学 2020-10-07 G. Yumnam , J. Guo , Y. Chen , V. Lauter , D. K. Singh

The thickness evolution of in-plane magnetization reversal in ultrathin films is studied with a theoretical model that takes account of surface roughness typical of epitaxial growth. Guided by N\'{e}el's model, step edge sites of…

材料科学 · 物理学 2007-05-23 R. A. Hyman , A. Zangwill , M. D. Stiles

Single phase (001)-oriented BiFeO3 (BFO) thin films grown by pulsed laser deposition can only be obtained in a narrow window of deposition pressure and temperature and have a low magnetic moment. Out of the stability window Fe- or Bi-rich…

材料科学 · 物理学 2007-05-23 Helene Bea , Manuel Bibes , Eric Jacquet , Karsten Rode , Peter Bencok , Agnes Barthelemy

Mixtures of Fe and Cu powders are cold-compacted and subsequently deformed with severe plastic deformation by high-pressure torsion, leading to bulk samples. The dilution of Fe in the Cu matrix is investigated with SQUID-magnetometry,…

The multiferroic properties of EuTiO3 are greatly enhanced when a sample is strained, signifying that coupling between strain and structural, magnetic or ferroelectric order parameters is extremely important. Here resonant ultrasound…

材料科学 · 物理学 2015-03-19 J. Schiemer , L. J. Spalek , S. S. Saxena , C. Panagopoulos , T. Katsufuji , M. A. Carpenter

In the paper we present the results of extensive studies of palladium-rich Pd1-xFex alloy films epitaxially grown on MgO single-crystal substrate. In a composition range of x = 0.01-0.07 these materials are soft ferromagnets, the saturation…