hysteresis loop
Very Low Frequency (Academic/Technical)Formal, Technical, Academic
Definition
Meaning
A closed curve on a graph representing the lagging effect in a system's response to changing forces.
A characteristic curve showing the dependence of a property of a system on its history, especially the lag in output (like magnetism) when an input force (like a magnetic field) is cycled. It is a fundamental concept in systems with memory or internal friction.
Linguistics
Semantic Notes
The term combines 'hysteresis' (from Greek 'hysteresis' meaning 'shortcoming' or 'lagging behind') with 'loop', describing the graphical shape. It implies irreversibility, energy loss, and path dependence within the system's cycle.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or pronunciation differences. Spelling of related terms (e.g., 'behaviour' vs. 'behavior') may follow regional conventions.
Connotations
None beyond the technical meaning.
Frequency
Identically rare outside specific engineering and scientific fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The [material] exhibits a [adjective] hysteresis loop.The [adjective] hysteresis loop indicates [property].A plot of [variable A] versus [variable B] yields a hysteresis loop.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[Not applicable for this highly technical term]”
Usage
Context Usage
Business
[Extremely rare, except in highly technical industries like materials science or energy]
Academic
Common in physics, materials science, electrical engineering, and control systems literature to describe energy dissipation and memory effects.
Everyday
Virtually never used.
Technical
Core term in magnetism (ferromagnetic hysteresis), elasticity (elastic hysteresis), economics (labour market hysteresis), and electronics.
Examples
By Part of Speech
verb
British English
- The material's properties hysteresis loop under cyclic loading.
- The magnetisation hystereses, forming a characteristic loop.
American English
- The system's response hysteresis loops when the input is reversed.
- The data hysterese, producing a clear loop on the graph.
adjective
British English
- The hysteresis-loop behaviour was analysed.
- We observed a clear hysteresis-loop effect.
American English
- The hysteresis-loop data confirmed the theory.
- A hysteresis-loop characteristic is evident.
Examples
By CEFR Level
- [Not applicable for this C2-level term]
- [Not applicable for this C2-level term]
- The graph showed a loop because the system did not return to its starting point immediately.
- The area enclosed by the magnetic hysteresis loop represents the energy dissipated as heat during one magnetisation cycle.
Learning
Memory Aids
Mnemonic
Imagine a dog on a leash lagging behind its owner on a walk. The path they trace together forms a loop, and the dog's position (output) always lags behind the owner's pull (input). This lagging loop is HYSTeresIs.
Conceptual Metaphor
A SYSTEM'S MEMORY IS A PATH-DEPENDENT LOOP. / IRREVERSIBILITY IS A WIDER LOOP.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'loop' as 'петля' in a purely physical sense; the term is a fixed technical compound. The standard translation is 'петля гистерезиса'.
- Do not confuse with general 'cycle' ('цикл'); hysteresis implies a specific lag and energy loss within that cycle.
Common Mistakes
- Mispronouncing 'hysteresis' as 'hi-ster-esis' (correct: 'his-ter-ee-sis').
- Using 'hysteresis curve' and 'hysteresis loop' interchangeably; the 'loop' specifically refers to the closed cyclic curve.
- Omitting 'loop' when the graphical representation is the topic.
Practice
Quiz
What does the area within a hysteresis loop typically represent?
FAQ
Frequently Asked Questions
No. 'Hysteresis' is the general phenomenon of lag or dependence on history. A 'hysteresis loop' is the specific graphical representation (the closed curve) that results from plotting input vs. output during a cyclic process.
It is crucial in electromagnetism (for transformer and motor core materials), materials science (for viscoelastic polymers), control theory, and even some economic models describing labour markets.
A wide loop indicates high energy loss (high coercivity in magnets, high damping in materials). A narrow loop indicates low energy loss and more reversible behaviour.
Conceptually, yes—hysteresis describes the lag. However, to quantitatively measure and visualise it, you typically observe the loop formed when the input is cycled. The loop is the evidence of the hysteresis.