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

3.4K
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...
3.4K
Types Of Superconductors01:28

Types Of Superconductors

1.8K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.8K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.9K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.9K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.9K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

15.6K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
15.6K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.6K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.6K

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

High-Chern-number orbital magnetism in twisted rhombohedral graphene.

Nature materials·2026
Same author

Magnon hydrodynamics in an atomically thin ferromagnet.

Science (New York, N.Y.)·2026
Same author

Decoding THz-Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Tailoring topological altermagnetic spin texture via interfacial exchange coupling in quasi-2D CrSb/(Bi, Sb)<sub>2</sub>Te<sub>3</sub> thin film.

Nature communications·2026
Same author

Proximity Magnetism in Mn(Bi,Sb)<sub>2</sub>Te<sub>4</sub>-(Bi,Sb)<sub>2</sub>Te<sub>3</sub>/MnTe Natural Heterostructures.

ACS nano·2026
Same author

Surface Reordering During Layer-by-Layer Growth on SrTiO<sub>3</sub>.

Advanced materials (Deerfield Beach, Fla.)·2026

関連する実験動画

Updated: Mar 20, 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

近接結合による高温鉄磁気トポロジック隔離相

Ferhat Katmis1,2,3, Valeria Lauter4, Flavio S Nogueira5,6

  • 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Nature
|May 27, 2016
PubMed
まとめ

トポロジカル・アイソレーターで 強化されたインターフェース・マグネティズムを実証しました 鉄磁気材料と結合したものです これは室温で 強力な磁気秩序を作り出し 先進的なスピントロニック装置の 道を切り開きます

さらに関連する動画

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.1K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

関連する実験動画

Last Updated: Mar 20, 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
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.1K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

科学分野:

  • 凝縮物質物理学
  • 材料科学
  • スピントロニクス

背景:

  • トポロジカル断熱器は,時逆対称性によって保護されたスピンモメンタムロックを持つユニークな導電表面状態を有しています.
  • トポロジカル・アイソレーターにフェロマグネティック・オーダーを統合することは,次世代の電子・スピントロニック・デバイスにとって極めて重要です.
  • 量子連動性を損なわずに 堅固で局所的な磁気秩序を達成することは 重要な課題です

研究 の 目的:

  • 二層システムにおけるトポロジカルに強化されたインターフェース磁性を実証する.
  • トポロジカルな断熱器ヘテロ構造で室温フェロマグネティズムを達成する可能性を調査する.
  • スピントロニックデバイスにおけるエネルギー効率の高いトポロジック制御メカニズムの可能性を調査する.

主な方法:

  • 鉄磁石断熱器 (EuS) とトポロジック断熱器 (Bi2Se3) を結合する二層システムの製造.
  • インターフェイス磁気性を探査するために,スピン偏振ニュートロン反射性実験を活用しました.
  • 磁気配列温度と磁気力の空間的範囲を分析した.

主要な成果:

  • トポロジカルに強化されたインターフェース磁気性を示し,室温まで持続します.
  • 表面フェロマグネティシズムは,トポロジカル・イソレータに約2nmまで広がっていることが観察されました.
  • 時間逆の対称性は 表面近くで破られ 大量状態は影響されない

結論:

  • 鉄磁気断熱器をトポロジック断熱器と結合すると,界面磁気性が著しく強化され,キュリー温度が上昇します.
  • エンジニアリングされたトポロジック隔離器は,トポロジック磁気電気反応を示し,磁気化ダイナミクスの電気フィールド制御を可能にします.
  • このアプローチは,将来のスピンベースの技術のためのエネルギー効率の高いトポロジック制御への道筋を提供します.