Descontinuado (Descontinuado) SM6689 Pó de Nitreto de Samário (SmN)

Samarium Nitride Powder (SmN) Description

Samarium Nitride (SmN) is a rare-earth nitride compound with the chemical formula SmN, known for its unique combination of magnetic, electronic, and structural properties. It crystallizes in a face-centered cubic (rock salt) structure, where each samarium atom is coordinated with six nitrogen atoms. One of the most remarkable features of SmN is its intrinsic ferromagnetism at low temperatures, with a Curie temperature typically around 27 K. This magnetic ordering arises from the partially filled 4f orbitals of the Sm³⁺ ions, making SmN an interesting material for research in magnetism and spintronics.

Electrically, SmN exhibits semiconducting behavior with a narrow bandgap estimated between 0.7-1.0 eV. This makes it a potential candidate for optoelectronic devices that operate in the infrared region. The material also displays high spin polarization of conduction electrons, which is valuable for spintronic applications such as spin filters or spin-injection layers in magnetic tunnel junctions.

Thermally, SmN is stable in inert or vacuum environments and can withstand moderate temperatures without decomposition. However, like many rare earth nitrides, it is sensitive to oxidation in air and must be handled or stored under protective atmospheres. Its robust lattice and resistance to chemical degradation in controlled settings make it suitable for thin-film growth and heterostructure engineering, especially in combination with other nitrides or semiconductors.

Samarium Nitride Powder (SmN) Applications

1. Spintronics: SmN is being studied as a potential material for spintronic devices, such as spin filters, spin valves, and magnetic tunnel junctions. Its high spin polarization makes it valuable for injecting or manipulating spin-polarized currents.

2. Infrared Optoelectronics: With its narrow bandgap, SmN can be used in optoelectronic devices operating in the infrared region, including detectors and emitters.

3. Magnetic Semiconductors: Due to its intrinsic ferromagnetism at low temperatures, SmN is considered a promising candidate for magnetic semiconductors used in future quantum and magneto-electronic technologies.

4. Thin Film Coatings: SmN thin films are used in multilayer structures and heterostructures with other rare earth nitrides or semiconductors for advanced electronic and optical applications.

5. Fundamental Research: It serves as a model system in research related to rare earth magnetism, 4f-electron systems, and correlated electron behavior in low-dimensional materials.

Samarium Nitride Powder (SmN) Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: 500g per PE box or 1000g per vacuum-sealed bag. Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

Samarium Nitride Powder (SmN) FAQs

Q1. What are the key properties of SmN?

SmN exhibits ferromagnetism at low temperatures, high spin polarization, and a narrow bandgap. It is chemically stable in inert or vacuum environments but can react with moisture or oxygen over time.

Q2. What are the common applications of SmN?

SmN is used in spintronics, magnetic semiconductors, infrared optoelectronics, and as thin film coatings in advanced electronics. It also plays a role in fundamental physics research.

Q3. Is SmN stable in air?

SmN is relatively sensitive to moisture and oxygen. It should be stored and handled in an inert atmosphere (e.g., argon or nitrogen) or vacuum to prevent oxidation or hydrolysis.

Performance Comparison Table with Competitive Products

Related Information

1.       Common Preparation Methods

Samarium Nitride (SmN) Powder is typically synthesized by a direct nitridation process in which high-purity samarium metal is heated in a flowing nitrogen or ammonia atmosphere at elevated temperatures, usually between 800°C and 1200°C. During the reaction, the metal absorbs nitrogen to form the nitride phase with a cubic crystal structure. The process is carried out in a controlled environment, such as a tube furnace under vacuum or inert gas conditions, to prevent contamination and oxidation. After nitridation, the resulting product is cooled under an inert atmosphere and then ground into a fine powder. Alternative methods include the reaction of samarium oxide (Sm₂O₃) with ammonia gas or nitrogen plasma at high temperatures, which can also yield SmN, though with varying particle sizes and phase purity. Post-synthesis, the powder is typically handled and stored under dry, inert conditions to avoid hydrolysis or oxidation from ambient moisture or air.