Magnetic Materials and Devices

Code:

F4019

Acronym:

F4019

Level:

400

Keywords
Classification	Keyword
OFICIAL	Physics

Instance: 2020/2021 - 2S

Active?	Yes
Responsible unit:	Department of Physics and Astronomy
Course/CS Responsible:	Master in Physics

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
M:F	5	Official Study Plan	1	-	6	49	162
MI:EF	20	study plan from 2017/18	4	-	6	49	162

Teaching language

Suitable for English-speaking students

Objectives

• Highlight the enormous technological importance of magnetic materials.

• Understand the basic concepts of magnetism in materials, and the parameters / characteristics relevant to applications.

 • Systematic use of  the SI system in Magnetism

 • To know the different classes of conventional magnetic materials and their applications in engineering.

• Enter the new magneto-electronica (spintronics). Multilayers, spin valves, tunnel junctions effect, hybrid devices.

• Meet the new functional materials, principles and potential technological

Learning outcomes and competences

Obtain advanced training in the field of magnetic materials and devices that enable the students to learn the key concepts underlying this area, and apply them to different relevant devices.

The program includes an introduction to magnetic materials highlighting the aspects of Condensed Matter Physics, that aremost relevant to the understanding of this cooperative phenomenon.

The student will recognize the main results of this area's contribution to the development of physics, namely quantum mechanics and relativity, without which we cannot explain magnetic phenomena in (nano) materials.

The student will be able to use Landau and mean field theories to explain phenomena such as ferromagnetism, antiferromagnetism, and paramagnetism.

The student will know the main applications of materials and magnetic devices relevant to areas such as earth magnetism, electric motors, refrigeration and other areas of energy, magnetic recording, etc, thus obtaining an important base knowledge for mastering the basics of this area.

Working method

Presencial

Program

Magnetism in materials, synthesis of the basic concepts. Microscopy origins of magnetism, magnetic moments. Types of interaction between magnetic moments; cooperative magnetism; spontaneous magnetization. Diversity of magnetic structures: PM, DM, FM, AFM, and FERRI helimagnetismo; spin glasses. Description field in the model medium. Magnetic anisotropy and its origins. Spin reorientation transitions. Magnetic materials and their parameters. Magnetization technique (parameters Tc, Ms, Ds, Hc, etc.).. Magnetic fields, walls, mobility. Effects desmagnetizantes. Hysteretic cycles; basic parameters; effect of temperature. Stoner-Wohlfarth model. Transition metals, rare earth oxides and magnetic semiconductors. Hard magnetic materials, soft and semi-hard. Magnetic properties of superconducting materials. Basic characteristics and technological capabilities. Optimization and processing of magnetic materials, the role of micro-and nanostructure. Conventional magnetic materials and their applications. Permanent magnets, electromagnets.

Mandatory literature

000011898. ISBN: 0-19-850591-4

Teaching methods and learning activities

Exposure of subjects in lectures and discussion with students. Problem solving with students. The solution of problems and presentation by students in TP classes is valued.

Evaluation Type

Distributed evaluation with final exam

Assessment Components

designation	Weight (%)
Exame	55,00
Trabalho escrito	30,00
Trabalho prático ou de projeto	15,00
Total:	100,00

Amount of time allocated to each course unit

designation	Time (hours)
Estudo autónomo	113,00
Frequência das aulas	49,00
Total:	162,00

Eligibility for exams

To participate in at least 3/4 of the TP classes

Calculation formula of final grade

i) Evaluation  over the semester with regular resolution on-line or inthe TP of exercises [15%] .

ii) Written work about magnetism with oral presentation (individual)  [30%].

iii) Final exam [55%].

Classification improvement

Grade improvement is possible in the "Exam" (55%) component by repetion of the final exam. The other components are maintained.

Observations

Jury: 
João Pedro Esteves de Araújo
André Miguel trindade Pereira