Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Ferromagnetism01:31

Ferromagnetism

3.2K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.2K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.7K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.7K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

709
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
709
Diamagnetism01:26

Diamagnetism

3.1K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.1K
Paramagnetism01:30

Paramagnetism

3.1K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.1K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.5K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.5K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Charge-Transfer-Mediated Boron Magneto-Ionics: Towards Voltage-Driven Multi-Ion Transport.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Paramagnetically driven superconducting re-entrance in Eu-doped infinite layer nickelates.

Nature communications·2026
Same author

Cr-LiF as a high energy density conversion-type cathode for Li-ion solid-state batteries.

Communications materials·2026
Same author

Tunable electrocaloric effect in lead scandium tantalate through calcium doping.

Nature communications·2026
Same author

Hybrid antiferroelectric-ferroelectric domain walls in noncollinear antipolar oxides.

Nature nanotechnology·2026
Same author

Quantifying Strain and Its Effect on Charge Transport in Ge/Si Core/Shell Nanowires.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

関連する実験動画

Updated: Feb 26, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K

強磁性層状酸化物ヘテロ構造における不均等な反極性変位の設計

Jonathan Spring1, Natalya S Fedorova2, Alexander Vogel3,4

  • 1Physik-Institut, University of Zurich, Zurich, 8057, Switzerland.

Advanced materials (Deerfield Beach, Fla.)
|February 25, 2026
PubMed
まとめ

研究者らは、La₂NiMnO₆とSm₂NiMnO₆の超格子を用いて酸化物ヘテロ構造を設計した。この研究は、予測された反極性イオン変位を確認し、先進材料における新規ハイブリッド不適格強誘電性の道を開く。

キーワード:
反極性変位ダブルペロブスカイト強磁性酸化物ヘテロ構造

さらに関連する動画

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

10.1K
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
06:44

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Published on: June 9, 2023

3.9K

関連する実験動画

Last Updated: Feb 26, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K
Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

10.1K
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
06:44

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Published on: June 9, 2023

3.9K

科学分野:

  • 材料科学
  • 物性物理学
  • 物性物理学

背景:

  • ヘテロ構造工学により、単相材料では達成できない新規材料機能性が可能になります。
  • ダブルペロブスカイトは、構造設計を通じた創発特性の探求に有望なプラットフォームを提供します。

研究 の 目的:

  • La₂NiMnO₆およびSm₂NiMnO₆の超格子におけるハイブリッド不適格強誘電性の可能性を調査すること。
  • 予測された反極性イオン変位とその極性挙動との相関を確認すること。

主な方法:

  • 超格子の原子精度成長。
  • 磁気特性評価のための社内磁力測定およびシンクロトロン測定。
  • 構造解析のための走査型透過電子顕微鏡（STEM）および第一原理計算。

主要な成果:

  • 合成された超格子は、堅牢な強磁性を示します。
  • 実験的および計算的証拠により、LaおよびSmイオンの不均等な反極性変位の存在が確認されました。
  • 構造モチーフは、極性挙動への予測される経路と一致しています。

結論:

  • 本研究は、設計された反極性変位を有する酸化物ヘテロ構造の実現を成功裏に実証しました。
  • これらの発見は、層状酸化物材料におけるハイブリッド不適格強誘電性の達成への道を開きます。
  • La₂NiMnO₆/Sm₂NiMnO₆超格子系は、新規機能性酸化物の設計のためのモデルとして機能します。